Last updated November 2026 · By Nick Hall, NFA owner who has followed every 2026 change to the SBR and suppressor rules
Quick take: AAC, the suppressor company that developed .300 Blackout, has brought back the MPW as a lineup of AR pistols, rifles, SBRs and complete uppers in .300 Blackout and 5.56 NATO. Complete guns list at $999.99 and uppers at $749.99. The SBRs are available from day one, which says a lot about how far the NFA picture has moved this year.
- What it is: The next-generation AAC MPW, an AR-pattern line sold as complete pistols, rifles, short-barreled rifles and upper assemblies, announced November 10, 2026.
- Price: $999.99 MSRP for any complete MPW and $749.99 MSRP for a complete upper.
- Where: AAC says the lineup is available immediately through its distribution network, with more retail partners to follow.
- Why it matters: AAC is shipping SBR configurations at launch, at the same $999.99 as the 16-inch rifle, a month after ATF stopped requiring NFA approval for SBRs.
AAC built its name on cans and on a cartridge. On November 10 it put that name back on a rifle, in the first full month of ATF’s no-approval policy for short-barreled rifles. We pulled the release and the spec table straight from AAC so you don’t have to, and the two do not agree on everything.
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Table of Contents
What AAC Put in the New MPW Lineup
AAC’s launch release, dated November 10, 2026 and sent from West Columbia, South Carolina, calls this its “next-generation MPW (Multi-Purpose Weapon) platform.” It covers complete pistols, rifles, short-barreled rifles and upper assemblies in two calibers.
The release names five barrel lengths. There is a 9-inch .300 AAC Blackout, plus four 5.56 NATO guns at 10.3, 12.5, 14.5 and 16 inches. AAC’s entry for the 10.3-inch gun opens with “The shortest 5.56 configuration in the family.”
Every build gets the same core parts. AAC lists FNC-coated 4150 CMV steel barrels, AAC ARX free-floating handguards, full-chrome bolt carrier groups with Carpenter 158 bolts and the AAC BLACKOUT flash hider. Complete guns add a two-stage trigger, an ambidextrous safety and Magpul furniture, “with final configurations varying by model.”
That flash hider is the point of the whole exercise. AAC says it connects the rifle “to AAC’s modern suppressor mounting ecosystem,” and the release names the M4-2000, 762-SDN-6 and 300-SD as the cans in that family. The company describes its approach as “treating the firearm and suppressor as a complete system.”
On history, AAC keeps it brief. The release says that long before suppressor-ready guns were a trend, AAC was “developing platforms with suppressed shooting in mind,” and that the original MPW “represented that approach.” It is also clear about what this is not: “The new MPW is not simply a reproduction of a legacy firearm.”
The AAC MPW Spec Sheet, Barrel by Barrel
The MPW Rifles page on AAC’s site carries the detail the release skips. Every barrel has a 1:7 twist. The .300 Blackout barrels are threaded 5/8×24 and run a pistol-length gas system, while the 5.56 barrels are threaded 1/2×28, with carbine gas on the 10.3 and 12.5 and mid-length gas on the 14.5 and 16.
Weights start at 5 lbs 9 oz for the 9-inch .300 Blackout and the 10.3-inch 5.56. The 12.5-inch guns are listed at 6 lbs flat, the 14.5 at 6 lbs 2 oz and the 16-inch rifle at 6 lbs 5 oz.
Furniture splits the family in two. The 9-inch and 10.3-inch guns are listed with a Magpul BSL brace instead of a stock, so those are the pistols. Everything else wears a Magpul MOE SL-K stock, and all six models on the page get a Magpul MOE SL grip.
Six, not five. The shop page lists a 12.5-inch .300 Blackout with an 11-inch handguard and a stock, a model the release never mentions. The release also says the 16-inch rifle carries a 13-inch handguard, while the shop table lists 12.5 inches for both the 14.5 and the 16.
The short guns match in both places, an 8-inch handguard on the 9-inch .300 Blackout and a 9-inch handguard on the 10.3. If the rail length on the 16-inch matters to your build, I would ask the dealer to confirm it before paying, since that is the one spec AAC prints two ways.
One Price for Every MPW, From 9 Inches to 16
The pricing is the simplest part. The release puts every complete MPW at $999.99 MSRP and every complete upper at $749.99 MSRP, and the shop page shows the same $999.99 for the line.
So on paper the 9-inch pistol, the 12.5-inch SBR and the 16-inch rifle all cost the same. A buyer who already owns a lower pays $250 less for the upper and still gets to pick the barrel length.
If you have been planning a short, suppressed .300 Blackout build, the 9-inch gun with its pistol gas, its 5/8×24 threads and a flash hider made to take an AAC can is the obvious place to start, since that is the configuration AAC itself describes as rooted in its history with the cartridge.
If you would rather feed it cheap 5.56 and save the subsonics for another gun, the 10.3 or the 12.5 makes more sense. Our .300 Blackout vs 5.56 comparison walks through that trade, and our list of the best .300 Blackout pistols shows what else this money buys.
Why the MPW SBRs Ship on Day One
The release says SBR configurations are available at launch through AAC’s distribution network, subject to applicable laws and transfer requirements. That one sentence carries more weight than it looks.
Since October 9, 2026, ATF has said it will not require approval or registration for short-barreled rifles, as a matter of enforcement policy, and the federal tax on making or transferring one has been $0 since January 1. Our breakdown of the ATF NFA guidance covers the limits, and they are real.
A dealer still runs a Form 4473 and a background check, and ATF says it is still writing the forms and regulations for dealer sales of SBRs outside the NFA process. The policy is not a repeal either. The National Firearms Act is still on the books, ATF says enforcement could resume, and it still processes NFA forms for anyone who wants to file one.
But the bigger trap is state law. ATF’s own letter says most states have criminal laws on NFA items, and many of them exempt only items registered under federal law. In a state built that way, an unregistered 12.5-inch MPW can still be a state crime no matter what ATF does.
Two more details for the short guns. ATF still wants a Form 20 before you take an SBR across state lines. And the 14.5-inch model sits on the line: with a stock, it is a rifle only if the muzzle device is pinned and welded to bring the barrel to 16 inches, and AAC does not say whether this one is.
When You Can Buy an AAC MPW
AAC says the whole lineup, SBRs included, is “available immediately through AAC’s distribution network, with availability expanding through additional retail partners.” The shop page puts a Find a dealer button next to the price.
Neither page gives a street price or a per-model SKU list, so your dealer is the place to ask about stock and the final configuration of the exact model you want.
AAC dates its own start to 1994, when Advanced Armament Corporation was formed to build silencers. The release frames the MPW as AAC “bringing its firearm platforms back alongside its growing suppressor portfolio,” and the shop page signs off with “Same legacy. More options. Welcome back.”
Fair enough. Check your state law before you take the short one home.
Frequently Asked Questions
What is the AAC MPW?
The MPW (Multi-Purpose Weapon) is an AR-pattern line from Advanced Armament Company, the suppressor maker. AAC announced the next-generation MPW on November 10, 2026 as complete pistols, rifles, short-barreled rifles and upper assemblies in .300 AAC Blackout and 5.56 NATO.
How much does the AAC MPW cost?
AAC lists every complete MPW firearm at $999.99 MSRP and every complete upper assembly at $749.99 MSRP. The price is the same across barrel lengths.
What barrel lengths does the AAC MPW come in?
The release lists a 9-inch .300 Blackout and 5.56 NATO models at 10.3, 12.5, 14.5 and 16 inches. AAC's shop page also lists a 12.5-inch .300 Blackout. Every barrel has a 1:7 twist.
Which AAC MPW models are pistols?
On AAC's spec table, the 9-inch .300 Blackout and the 10.3-inch 5.56 come with a Magpul BSL brace instead of a stock, which makes them the pistols. The other models wear a Magpul MOE SL-K stock.
Is the AAC MPW suppressor ready?
Yes. The .300 Blackout barrels are threaded 5/8x24 and the 5.56 barrels 1/2x28, and every model ships with an AAC BLACKOUT flash hider, which AAC ties to its own suppressor mounting system.
Do I need ATF approval to buy an MPW SBR?
Since October 9, 2026, ATF has said it will not require NFA approval or registration for short-barreled rifles, as an enforcement policy rather than a repeal. A dealer still runs a Form 4473 and a background check, and many state laws on SBRs exempt only guns registered under federal law, so check your state law first.
What gas system does the AAC MPW use?
AAC lists pistol-length gas on the .300 Blackout models, carbine gas on the 10.3-inch and 12.5-inch 5.56 models and mid-length gas on the 14.5-inch and 16-inch 5.56 models.
Where can I buy an AAC MPW?
AAC says the MPW is available through its distribution network, with more retail partners being added, and its shop page links to a dealer locator. SBRs are subject to federal, state and local transfer rules.
Related Reading
- 9 Best 300 Blackout Rifles (2026)
- Best 300 Blackout Uppers (2026): 6 Picks for Every Build
- 11 Best AR Pistols (2026): Tested and Ranked
- Pistol Brace Rules (2026): What Happened to the ATF Rule
- Best Suppressors in 2026: Top Silencers for Every Caliber
- AAC Ammo Is Now PSA Ammo: Inside the Rebrand and Its 3 New Lines
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