Benelli M4 Review: The Combat Shotgun That Earned Its Stripes (2026)

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Review: Benelli M4 Tactical – The Combat Shotgun That Earned Its Stripes

Our Rating: 9/10

• Model: Benelli M4 Tactical (11707)
• Gauge: 12 Gauge
• Chamber: 2-3/4″ and 3″
• Action: Semi-auto, Auto-Regulating Gas-Operated (ARGO) system
• Barrel Length: 18.5″
• Overall Length: 40″
• Weight: 7.8 lbs
• Capacity: 5+1 (civilian model)
• Choke: Modified (M)
• Sights: Ghost-ring rear, windage-adjustable front
• Stock: Black synthetic, pistol grip
• Finish: Anodized black
• Picatinny Rail: Yes
• MSRP: $2,299
• Street Price: $1,800-$2,050 (Use our live pricing for the best up to date deal)
• Made in: Urbino, Italy (Benelli)

Quick Take: Worth Every Penny (And There Are a Lot of Pennies)

The Benelli M4 is the shotgun the United States Marine Corps chose to replace every combat shotgun in its inventory. Not a budget pick. Not a political contract. The US military tested everything on the market through a joint service program run by ARDEC at Picatinny Arsenal, and the M4 (designated M1014 in military service) won on pure merit. The contract was awarded in 1999, and nothing has knocked it off the throne since.

I ran 500 rounds through the M4 over several range sessions, and the experience confirmed what the military already knew. This gun runs. It runs dirty, it runs clean, it runs with cheap birdshot and premium buckshot and everything in between. Zero malfunctions across every type of 12-gauge ammunition I could get my hands on.

The catch? It costs nearly $2,000 at street price, although we do sometimes come across deals around $1,800 on our price comparison tool. That’s real money, and there are excellent tactical shotguns available for a quarter of that.

So the question isn’t whether the Benelli M4 is the best semi-auto tactical shotgun you can buy. It is. The question is whether “the best” is worth four times the price of “very good.”

Best For: Serious home defense, tactical training, law enforcement, and anyone who wants the most proven combat shotgun in the world and is willing to pay for it.

Benelli M4 Scorecard

The ARGO System: Why This Shotgun Never Quits

Every conversation about the Benelli M4 starts and ends with the Auto-Regulating Gas-Operated (ARGO) system. It’s the reason the Marines chose this gun. It’s the reason it works when other semi-autos choke. And it’s fundamentally different from every other gas-operated shotgun on the market.

Most gas-operated shotguns use a single gas piston located under the barrel, ahead of the forend. The ARGO system uses two small stainless steel pistons positioned just ahead of the chamber. This design is shorter, simpler, and self-cleaning. Carbon and fouling get blown out of the system with every shot instead of building up inside a long gas tube. The result is a shotgun that stays running even when it’s filthy.

The “auto-regulating” part means the system adjusts itself based on the power of the shell you’re shooting. Light 2-3/4″ birdshot? The pistons move just enough to cycle the action. Heavy 3″ magnum slugs? The system bleeds off the extra gas automatically. You never touch a gas adjustment ring or swap a piston. It just works.

I tested this claim deliberately by alternating between cheap Federal bulk birdshot and full-power Winchester Super-X slugs in the same magazine. The M4 didn’t care. It cycled every round without hesitation. That kind of versatility is what separates the ARGO system from traditional gas guns that need a break-in period or struggle with light loads.

A Brief History: From Urbino to Fallujah

Benelli designed the M4 in the late 1990s specifically for the U.S. military Joint Service Combat Shotgun program. The Marines were looking for a semi-automatic 12 gauge that could handle the full spectrum of combat shotgun duties: breaching, close-quarters combat, and point defense. The M4 won the contract in 1999 and entered service as the M1014 Joint Service Combat Shotgun.

The gun saw its baptism of fire in Afghanistan and Iraq. Marines carried M1014s through the streets of Fallujah, through the mountains of Helmand Province, and through years of door-kicking operations where a combat shotgun earns its keep or gets replaced. The M4 earned its keep. Reports from the field consistently praised its reliability in sand, dust, mud, and extreme temperatures.

Every M4 is still manufactured in Urbino, Italy, at Benelli’s factory. The military version differs from the civilian model in a few ways (most notably a 7+1 magazine tube and a collapsible stock), but the heart of the gun is identical. The same ARGO system, the same barrel, the same receiver. When you buy a civilian M4, you’re getting the same engineering that went to war.

Competitor Comparison

Beretta 1301 Tactical ($1,500-$1,800)

The Beretta 1301 Tactical is the closest competitor to the M4 and the one most people cross-shop. It’s lighter (6.35 lbs vs 7.8 lbs), cycles faster thanks to Beretta’s BLINK gas system, and costs $500-$700 less. For most civilian home defense scenarios, the 1301 is arguably the smarter buy. It gives you 90% of the M4’s performance at 65% of the price.

Where the M4 pulls ahead is combat-proven durability. The ARGO system has a longer track record under harsh conditions than the BLINK system. The M4’s anodized receiver is also thicker and more heavily built than the 1301’s. If you’re buying a shotgun that needs to survive years of hard training or professional duty use, the M4’s extra cost buys real insurance. For a home defense gun that sees 200 rounds a year? The 1301 is the better value play.

Mossberg 590A1 ($650-$750)

The Mossberg 590A1 is a completely different animal. It’s a pump action, which means slower follow-up shots but absolute ammunition reliability. It costs roughly a third of the M4’s price. The 590A1 also gives you 8+1 capacity in the 20-inch configuration, which is three more rounds than the civilian M4.

If budget is a factor (and $1,800 is a factor for most people), the 590A1 is an outstanding tactical shotgun that has its own military pedigree. You give up the speed of semi-auto fire and the reduced felt recoil, but you gain simplicity, capacity, and a lot of money left over for ammo and training. A well-trained shooter with a 590A1 is more dangerous than an untrained shooter with an M4.

Remington 870 Tactical ($400-$550)

The Remington 870 Tactical is the pump shotgun that’s been defending American homes since your grandfather was young. At $400-$550, it costs less than a quarter of the M4. The aftermarket is massive. Parts and accessories are available everywhere. It’s a proven platform with millions of units in circulation.

The comparison between an 870 and an M4 really comes down to how much you value semi-auto speed and reduced recoil. For a gun that lives in the closet and might never get fired in anger, the 870 makes financial sense. For a gun you’re going to train with regularly and depend on in a critical situation, the M4’s gas-operated action gives you a significant advantage in follow-up shot speed and shooter fatigue.

FN SLP Mark I ($700-$800 used)

The FN SLP Mark I was discontinued around 2020, but used examples are still floating around and worth considering if you find one. It uses a traditional single-piston gas system and offers 8+1 capacity out of the box, which is a significant advantage over the civilian M4’s 5+1. FN’s military connections lend it credibility, and the SLP has a solid reputation among competitive 3-gun shooters.

The downside is aftermarket support. The Benelli M4 has a much larger ecosystem of accessories, replacement parts, and aftermarket upgrades. The FN SLP’s gas system also requires more maintenance than the self-cleaning ARGO design. For the money, the SLP is a capable tactical shotgun. But it doesn’t have the combat track record or the cult following that the M4 commands.

Technical Deep Dive

Receiver and Action

The M4’s receiver is machined from aircraft-grade aluminum alloy with a hard anodized black finish. It’s noticeably thicker and heavier than receivers on competing semi-autos like the Beretta 1301 or the Mossberg 940. That extra material isn’t for show. It’s there because this gun was designed to survive being thrown into the back of military vehicles, dropped on concrete, and used as a breaching tool.

The bolt is a three-lug rotating design that locks into a steel barrel extension. Lockup is tight and positive. The bolt carrier rides on dual guide rods with a return spring system that contributes to the M4’s famously smooth cycling. When you fire, the action moves with a kind of mechanical precision that you can feel. There’s no sloppiness, no excessive vibration. Just a clean, fast cycle.

Barrel and Choke

The 18.5-inch barrel is chrome-lined with a Modified (M) choke that is not interchangeable. This is one area where the M4 shows its military DNA. The military wanted a fixed choke that couldn’t work loose under sustained fire, so Benelli delivered exactly that. The Modified constriction is a good middle ground for buckshot patterning and slug accuracy at defensive distances.

Some shooters wish they could swap in an Improved Cylinder choke for wider buckshot patterns at close range, or a Full choke for tighter long-range patterns. That flexibility isn’t available on the M4. You get Modified, and you work with it. In practice, Modified is the right choice for a tactical shotgun. It keeps buckshot patterns tight enough to be precise at 25 yards while still opening up enough to be forgiving at hallway distances.

Ghost Ring Sights

The M4 ships with a ghost ring rear sight and a windage-adjustable protected front post. The ghost ring is fast. Your eye naturally centers the front post inside the aperture, which means target acquisition is almost instinctive at close range. The rear aperture is large enough for rapid engagement but small enough to give you precision with slugs out to 75 yards.

The front sight is adjustable for windage and sits inside protective wings that prevent it from getting knocked off zero. The rear ghost ring clicks for elevation. Both sights are metal and feel built to last. I zeroed the sights at 25 yards with slugs and left them alone for the rest of my testing. They held zero perfectly through 500 rounds.

Picatinny Rail

A full-length Picatinny rail runs along the top of the receiver, giving you the option to mount a red dot, holographic sight, or magnified optic. The rail is machined into the receiver, not bolted on. It co-witnesses with the ghost ring sights when you run an optic at standard height, which gives you a backup aiming solution if your optic fails.

A lot of M4 owners run an Aimpoint Micro or a Holosun 510C on the rail. I tested mine with the factory ghost rings and found them perfectly adequate for defensive distances. But if you train at longer ranges or shoot competitively, a red dot on the M4 is a serious upgrade.

Stock and Ergonomics

The civilian M4 (model 11707) comes with a fixed black synthetic pistol grip stock. The length of pull is a standard 14.375 inches, which fits most adult shooters comfortably. The pistol grip gives you a firm hold during rapid fire, and the stock has a thick rubber buttpad that does a respectable job of soaking up 12-gauge recoil.

The military version ships with a collapsible stock, but the civilian model doesn’t due to import regulations. You can upgrade to a collapsible stock aftermarket, but you’ll need to navigate 922(r) compliance by swapping enough US-made parts. More on that in the upgrades section. The fixed stock works fine, but the lack of a collapsible option from the factory is a legitimate gripe at this price point.

Balance is excellent. Despite the 7.8-pound weight, the M4 doesn’t feel nose-heavy or tail-heavy. It comes up to the shoulder naturally and tracks smoothly between targets. Recoil management is where the weight becomes an asset. The mass, combined with the ARGO system’s gas operation, makes 2-3/4″ buckshot feel like a firm push rather than a punch.

Range Testing: 500 Rounds, Zero Malfunctions

I put exactly 500 rounds through the Benelli M4 across four range sessions. The ammunition mix was deliberate: premium defensive loads, budget birdshot, slugs, and reduced-recoil options. I wanted to see if the ARGO system’s reputation was earned or just marketing. It’s earned.

Buckshot Performance

Federal FliteControl 00 Buck was the best performer, as expected. At 15 yards, all eight pellets stayed within a 3.5-inch group. At 25 yards, the pattern opened to about 6 inches. FliteControl’s wad design is specifically engineered for tight patterns, and it shows. If you’re loading your M4 for home defense, this is the ammunition to buy.

Hornady Critical Defense 00 Buck patterned slightly wider at 15 yards, with all pellets inside a 5-inch spread. Still excellent for defensive use. The Hornady load uses a Versatite wad that helps control the pattern, and it’s a solid alternative if you can’t find the Federal FliteControl in stock.

Standard Winchester Super-X 00 buckshot opened up to 8-9 inches at 15 yards. That’s a normal pattern for non-FliteControl buckshot through a Modified choke. At home defense distances of 5-10 yards, every buckshot load I tested put all pellets inside center mass on a silhouette.

Slug Accuracy

Winchester Super-X rifled slugs grouped at about 3 inches at 50 yards from a standing position using the ghost ring sights. That’s solid for a smoothbore with iron sights. Off a bench rest at the same distance, I tightened that to 2.5 inches. Fiocchi reduced-recoil slugs printed nearly the same groups with noticeably less felt recoil, making them an excellent training option.

At 75 yards (benched), groups opened to about 4.5 inches with the Winchester Super-X loads. That’s minute-of-bad-guy accuracy at distances where you’d rarely use a shotgun anyway. The ghost ring sights are precise enough for this work, though a red dot would tighten things up further.

Birdshot and Light Loads

Here’s where the ARGO system really proves itself. I ran 200 rounds of the cheapest Federal bulk birdshot I could find (those 100-round value packs from the big box store). Every single round cycled. No short-stroking, no failures to eject, no stovepipes. Many semi-auto shotguns struggle with light loads, especially during break-in. The M4 didn’t even hiccup.

I also intentionally tested the gun dirty. After 300 rounds without cleaning, I loaded five rounds of the cheap birdshot and fired them as fast as I could pull the trigger. All five cycled perfectly. The self-cleaning ARGO design was working exactly as advertised. Carbon was being blown out of the gas ports with every shot instead of accumulating inside the system.

Performance Results

The 922(r) Problem: What Civilian Buyers Need to Know

Here’s the one topic that frustrates every Benelli M4 owner: 922(r) compliance. Because the M4 is an imported shotgun, federal law (18 U.S.C. 922(r)) limits the number of foreign-made parts that can be in an assembled semi-automatic shotgun. The civilian M4 ships with a 5+1 magazine tube and a fixed stock specifically to comply with 922(r) in its factory configuration.

If you want to add a magazine tube extension (to get 7+1 capacity like the military version) or swap to a collapsible stock, you need to replace enough parts with US-manufactured components to bring the foreign parts count below the legal threshold. This typically means swapping the trigger group, follower, and a few other internals with American-made equivalents.

Companies like Carriercomp and Freedom Fighter Tactical sell 922(r) compliance kits specifically for the M4. The process isn’t difficult if you’re mechanically inclined, but it adds $200-$400 to an already expensive shotgun. It’s an annoying regulatory hurdle that exists because of import law, not because of any engineering limitation. The M4 was designed for 7+1 capacity and a collapsible stock. The civilian version is artificially limited.

Known Issues and Common Problems

5+1 capacity limitation. This is the biggest practical complaint. Six rounds of 12 gauge goes fast in a defensive situation. The Mossberg 590A1 gives you 8+1, and the FN SLP gives you 8+1, both for significantly less money. You can extend the M4’s magazine tube, but you’ll need the 922(r) compliance kit to do it legally. That’s an extra expense on top of an already premium price tag.

Price. Let’s be direct about it. At $1,800-$2,050 street price, the M4 costs more than a Beretta 1301 and a Remington 870 combined. The quality justifies a premium, but four times the price of a perfectly functional tactical pump gun is hard to swallow for shooters who aren’t flushed with cash. The M4 is the best, but “best” has diminishing returns past a certain point.

Fixed choke. The Modified choke is permanently installed. You can’t swap to Improved Cylinder for wider patterns or Full for tighter ones. For a $2,000 shotgun, an interchangeable choke system would be a welcome addition. Benelli’s reasoning (military requirement for a fixed choke that can’t loosen) makes sense, but it limits versatility for civilian users.

Weight with accessories. At 7.8 lbs empty, the M4 is already on the heavy side for a shotgun. Add a weapon light (4-6 oz), a red dot (3-5 oz), a side saddle loaded with shells (8-10 oz), and a sling (3-4 oz), and you’re pushing past 9 lbs. That’s manageable for a home defense gun, but it adds up during extended training sessions.

Aftermarket stock compatibility. Not every aftermarket stock fits the M4 without modification. The receiver’s geometry is unique, and some stocks designed for the M4 require fitting or shimming. Do your research before buying, and stick to reputable brands that specifically list M4 compatibility.

Upgrades and Accessories

Home Defense Considerations

The Benelli M4 is one of the finest home defense shotguns money can buy, but “finest” and “best value” are different conversations. If you’re building a dedicated home defense setup around the M4, there are a few things to consider.

First, the semi-auto action is a genuine advantage in a home defense scenario. Follow-up shots are faster and recoil is more manageable than any pump-action shotgun. Under stress, you don’t have to think about racking the slide. You pull the trigger and the gun handles the rest. That simplicity matters when adrenaline is dumping and fine motor skills are degraded.

Second, the 5+1 capacity is a concern. In a home defense situation, six rounds of 12 gauge is probably enough for most scenarios. But “probably enough” isn’t the confidence level most people want when their family’s safety is on the line. If capacity matters to you (and it should), factor in the cost of a magazine tube extension and 922(r) compliance kit when calculating the true cost of ownership.

Third, you need a weapon light on any home defense gun. Period. You can’t shoot what you can’t identify, and you can’t identify a threat in a dark hallway without a light. The M4’s forend has enough real estate for a rail-mounted light, and the Picatinny rail on top gives you options for mounting a light/laser combo. Budget at least $120-$300 for a quality light setup.

For a full breakdown of where shotguns fit in the home defense picture compared to other platforms, check out our Shotgun vs AR-15 for Home Defense guide.

Ammunition Selection

The M4 isn’t picky about ammo, but your choice of defensive load still matters. Here’s what I’d recommend based on my testing.

For home defense, Federal FliteControl 00 Buck is the clear winner. Its tight patterning means every pellet goes where you aim it, reducing the risk of stray pellets leaving the intended target zone. If you can’t find FliteControl, Hornady Critical Defense 00 Buck is an excellent second choice. Both are designed with wad technology that controls pattern spread.

For training and practice, cheap birdshot is your friend. The ARGO system will eat it all day, so buy whatever is cheapest and put rounds downrange. Federal bulk birdshot from your local big box store is perfect for this. Save the expensive buckshot for pattern testing and verification.

For slug work, Winchester Super-X rifled slugs performed well and are widely available. Fiocchi reduced-recoil slugs gave nearly identical accuracy with less felt recoil, making them ideal for extended training sessions. Slugs turn the M4 into a capable 75-yard weapon, which extends its usefulness well beyond typical shotgun distances.

How Does It Compare to a Pump Action?

The pump vs semi-auto debate is one of the oldest arguments in shotgun circles, and the Benelli M4 sits at the top of the semi-auto side. The advantages of the M4 over a pump gun like the 590A1 or 870 come down to three things: speed, recoil management, and simplicity under stress.

A trained shooter can fire a semi-auto shotgun roughly 30-40% faster than a pump action. That’s a significant advantage in a fight. The M4’s gas-operated action also absorbs a portion of the recoil energy, so follow-up shots are easier to place accurately. And you eliminate the risk of short-stroking under stress, which is the number one malfunction with pump shotguns in defensive situations.

The pump action’s advantages are simplicity, cost, and ammunition flexibility. A pump will cycle anything, including less-lethal rounds and specialty ammunition that semi-autos can’t always handle. Pump shotguns are also less expensive to buy and maintain. But for a shooter who can afford the M4 and commits to training with it, the semi-auto advantage is real and measurable.

Who Should Buy the Benelli M4?

The M4 makes the most sense for three types of buyers. The first is the serious home defense shooter who trains regularly and wants the absolute best tool for the job regardless of cost. If you shoot monthly and consider your home defense setup a serious investment, the M4 will reward you with a level of reliability and performance that lesser guns can’t match.

The second is the law enforcement professional or security contractor who needs a duty shotgun that will function perfectly in the worst conditions. The M4’s combat pedigree isn’t theoretical. It’s been validated in actual combat by the world’s best-trained military forces.

The third is the collector or enthusiast who wants to own the most iconic tactical shotgun ever made. The M4 has earned a cult status in the firearms world, and it’s one of those guns that holds its value. Used M4s sell for close to what they cost new because demand consistently exceeds supply.

Who Should Look Elsewhere?

If you’re on a budget, the M4 is not the answer. A Mossberg 590A1 at $550 or a Remington 870 at $450 will defend your home just as effectively in most realistic scenarios. The money you save could go toward ammo and training, which matter more than brand name on the gun.

If you want a hunting shotgun that doubles for defense, the M4 is too specialized. Its fixed Modified choke, 18.5-inch barrel, and tactical sights make it a poor choice for waterfowl, upland birds, or sporting clays. Get a Benelli M2 or a Beretta A300 if you need a dual-purpose semi-auto.

If capacity matters more than brand prestige, several competitors offer more rounds for less money. The FN SLP gives you 8+1 out of the box. The Mossberg 590A1 gives you 8+1 with the 20-inch barrel. Getting the M4 to 7+1 requires a magazine extension and 922(r) compliance parts, adding $300-$400 to the total cost.

Maintenance and Cleaning

The ARGO system is one of the easiest semi-auto shotgun actions to maintain. The two small pistons and their cylinders are accessible by removing the forend, and they can be wiped clean in about 30 seconds. There’s no long gas tube to scrub out, no complex gas regulator to disassemble. The self-cleaning design means the pistons stay relatively clean even after hundreds of rounds.

I cleaned the M4 after every range session, but I also deliberately tested it dirty. After 300 rounds without cleaning, the action was still running smoothly. The bolt and bolt carrier showed carbon buildup, but nothing that affected function. For a home defense gun, I’d recommend cleaning after every range trip. But it’s reassuring to know that the gun won’t quit if you’re a few hundred rounds past your last cleaning.

Field stripping is straightforward. Push out the trigger group pins, pull the trigger group, remove the bolt and carrier. No tools required. Reassembly is equally simple. Benelli’s documentation is clear, and there are dozens of YouTube tutorials available if you need a visual guide.

The Verdict: 9/10

The Benelli M4 is the best semi-automatic tactical shotgun you can buy. That’s not a controversial statement. It’s a shotgun that was designed for combat, tested in combat, and adopted by the most demanding military force on the planet. The ARGO gas system is the most reliable semi-auto action in any shotgun, and the build quality reflects Italian engineering at its finest.

The reason it gets a 9/10 instead of a perfect score comes down to value and the 922(r) situation. At $1,800-$2,050, you’re paying a significant premium over excellent competitors like the Beretta 1301 Tactical. The 5+1 civilian capacity is artificially limited, and getting the gun to its true potential (7+1 with a collapsible stock) costs another $300-$500 in parts. That’s a lot of money for a shotgun, even one this good.

But if you want the absolute best and you’re willing to pay for it, nothing else comes close. I’ve tested a lot of tactical shotguns, and the M4 is the one I’d grab if I could only keep one. It runs perfectly, it’s built like a tank, and it has the combat record to prove that it works when it matters most. That kind of confidence is worth something.

Best For: Serious home defense, professional duty use, high-round-count training, and shooters who want the most combat-proven tactical shotgun ever made.

FAQ: Benelli M4

What is the Benelli M4 ARGO gas system?

The Auto-Regulating Gas-Operated (ARGO) system uses two small stainless steel pistons located just ahead of the chamber, rather than a single piston under the barrel like most gas-operated shotguns. This design is self-cleaning (carbon gets blown out with each shot), auto-regulating (adjusts to different shell power levels automatically), and extremely reliable. It’s the reason the M4 can cycle everything from light birdshot to heavy 3-inch magnums without adjustment.

Why does the civilian Benelli M4 only hold 5+1 rounds?

The civilian M4’s 5+1 capacity is a result of 922(r) import compliance, not an engineering limitation. The military M1014 holds 7+1. To increase capacity on the civilian model, you need to install a magazine tube extension and replace enough parts with US-manufactured components to comply with 18 U.S.C. 922(r). Several companies sell compliance kits that make this a straightforward upgrade.

Is the Benelli M4 worth the price over a Beretta 1301?

It depends on your use case. For most home defense scenarios, the Beretta 1301 Tactical at $1,500-$1,800 delivers roughly 90% of the M4’s performance at 65% of the cost. The M4 justifies its premium through superior build quality, a longer combat track record, and the ARGO system’s legendary reliability. If you’re a high-volume shooter or professional user, the M4 is worth the extra investment. For a home defense gun that sees 200 rounds a year, the 1301 is the smarter financial choice.

Can the Benelli M4 shoot birdshot reliably?

Yes. The ARGO system’s auto-regulating design cycles light birdshot loads without issue, even straight out of the box with no break-in period. I tested 200 rounds of cheap Federal bulk birdshot through the M4 with zero malfunctions. Many semi-auto shotguns struggle with light loads during their break-in period, but the M4 handles them from round one.

What is 922(r) compliance and why does it matter for the Benelli M4?

Section 922(r) of federal law limits the number of foreign-made parts in an assembled semi-automatic shotgun. Since the M4 is imported from Italy, it ships in a configuration that complies with this law (fixed stock, 5+1 capacity). If you want to modify it with a collapsible stock or extended magazine tube, you need to swap enough internal parts with US-made components to stay under the foreign parts limit. Companies like Carriercomp and Freedom Fighter Tactical sell kits specifically for this purpose.

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FAQ – Benelli M4