Stealth Arms Platypus Review (2026): The 2011 That Runs Glock Mags

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Review: Stealth Arms Platypus – The 2011 That Runs Glock Mags

Our Rating: 8.4/10

• RRP: From $1,875
• Street Price: $1,875 to $2,419 (Use our live pricing for the best up to date deal)
• Caliber: 9mm Luger
• Action: Single action, double stack 1911
• Barrel Length: 5in Government, 4.25in Commander
• Magazines: Glock 17 or SIG P320 pattern
• Frame: One-piece 7075 aluminium frame and grip
• Manufacture: Machined in house in the USA
• In the box: Two magazines and a fabric range bag
• Lead time: 10 to 12 weeks on solid colours, 17 to 19 weeks on backfilled orders

Quick Take

Every 2011 owner has the same complaint eventually, and it is never about the gun. It is about magazines. Sixty to eighty dollars each, six or eight of them for competition, and half the time they are back-ordered. On a platform that already costs two thousand dollars, that is a genuinely annoying tax.

Stealth Arms built the Platypus around Glock 17 magazines instead. You keep the 1911 grip angle, the thumb safety and the single action trigger, and you feed it with the cheapest, most available pistol magazine on earth. It takes SIG P320 mags too if you would rather go that way.

The frame and grip are machined from one piece of 7075 aluminium, which is unusual in a world of steel frames and bolt-on polymer modules. That is the whole pitch: solve the magazine problem, machine it properly in America, and accept that almost nobody has heard of you.

Best For: the competition or high-volume shooter who already owns a drawer full of Glock magazines and refuses to start a second collection. Not the pick if you need a gun this month.

Why the Glock Magazine Thing Matters

It is easy to dismiss this as a gimmick until you do the arithmetic. A competition shooter running a standard 2011 needs six magazines minimum. At seventy dollars each that is four hundred and twenty dollars, and you will replace springs and followers over the years on top.

Glock 17 magazines cost roughly twenty five dollars for factory and less for quality aftermarket. Six of those is a hundred and fifty. You have saved most of three hundred dollars before you have fired a shot, and you can buy replacements at any counter in America on a Saturday afternoon rather than waiting on a back-order.

There is a second benefit that nobody mentions. Glock magazines are the most tested pistol magazine in existence. Millions of them, decades of use, every failure mode documented. That is a genuinely good thing to build a feeding system around.

The trade is grip geometry. A Glock magazine is a different shape to a 2011 magazine, so the grip ends up slimmer front to back than a standard double stack 1911. Some shooters prefer that. If you have small hands it is a real advantage.

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Configurations Worth Knowing

Stealth Arms builds these to order rather than stacking them on a shelf, so the configuration question is really a question about how long you are willing to wait.

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Shooting It

We put 700 rounds through this one across three sessions in an indoor bay, deliberately feeding it from a mix of factory Glock magazines, older well-used Glock mags and a couple of Magpul PMAGs to see whether it was fussy about which ones it got.

Reliability

One stoppage in the whole 700. A failure to feed at round 340, and it came out of a fifteen year old Glock magazine with a tired spring that I should have retired years ago. Swapped the magazine and it never repeated. Factory Glock mags and the PMAGs both ran without a hiccup.

That is the answer to the obvious question about whether a 1911 fed by Glock magazines is asking for trouble. In this gun it is not, provided your magazines are in decent shape. The feed geometry has clearly had work put into it.

Accuracy and Handling

Off a bag at 25 yards the Federal American Eagle 124 grain grouped around 1.8in for five shots, with Blazer Brass 115 grain opening to about 2.4in. That is respectable and roughly where a well-made 2011 should sit.

The aluminium frame makes it lighter than a steel gun, so it comes up fast and moves a little more in recoil. The slimmer grip is the thing you notice most, and if you have ever found a standard 2011 grip too fat front to back, this will feel immediately better in the hand.

Ammunition Log

• CCI Blazer Brass 115gr FMJ: 300 rounds
• Federal American Eagle 124gr FMJ: 250 rounds
• Sellier & Bellot 124gr FMJ: 100 rounds
• Speer Gold Dot 124gr: 50 rounds
• Total: 700 rounds, 1 stoppage, traced to a worn magazine

After 700 Rounds

Stripped down at the end, the wear told a clean story. Even bright rub marks on both slide rails, no galling on the aluminium where the steel slide runs, and no peening on the locking lugs. Aluminium frames worry people on that point and this one showed nothing to justify it over 700 rounds.

The magazine catch and the inside of the magwell were the busiest areas, which makes sense on a gun being fed from a stack of different magazines. Carbon around the breech face was ordinary for the round count. The finish had picked up a small shiny patch on the muzzle end of the slide where it met the bench, which is what a working finish does.

What This Means for You

• Magazines: the gun is only as reliable as what you feed it. Retire tired springs and it runs.
• Break-in: minimal. It ran from the first magazine, unlike most tightly fitted 1911s.
• Ammo preference: 124 grain grouped better than 115 grain, though it was not fussy about either.
• Maintenance: keep the rails lubricated. Aluminium on steel wants oil more than steel on steel does.
• Accuracy expectation: under 2in at 25 yards with decent ammunition.

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Who This Gun Is Actually For

There is one buyer this makes obvious sense for, and a couple more where it is worth thinking about.

The obvious one is the high-volume shooter who already lives in the Glock ecosystem. You have a drawer of magazines, you know they work, and the idea of starting a second collection at seventy dollars a piece is the thing that has kept you out of the 2011 world so far. This gun removes that objection entirely, and over a few years the savings are not trivial.

The second is the shooter with smaller hands. A standard 2011 grip is fat front to back because a 2011 magazine is fat, and plenty of people simply cannot get a proper firing grip on one. Because the Platypus is built around a Glock magazine, the grip is slimmer, and that changes who can shoot the platform comfortably. If you have picked up a Staccato and found it too big, try this before writing off double stack 1911s altogether.

The third is the buyer who cares where things are made. This is machined in house in America by a small shop, not assembled from imported parts. That matters to some people and not to others, and there is no wrong answer, but if it matters to you there are not many options at this price. Our best full size 9mm pistols guide has the wider view if you are still weighing the money.

Who it is not for is anyone who wants to walk into a shop, handle three guns and leave with one. That is a perfectly reasonable way to buy a firearm and it is simply not available here.

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Technical Deep Dive

The One-Piece Frame

This is the part worth understanding. Most 2011s use a two-part arrangement: a steel frame rail section with a separate grip module bolted to it. That is how the platform was designed and it works, but it introduces a joint, and joints are where things move.

Stealth Arms machines the frame and the grip from a single billet of 7075 aluminium. There is no seam, no bolt, nothing to loosen. It also means the checkering is cut directly into the frame rather than moulded into a polymer part, which is why it feels the way it does in the hand.

Magazine Well and Feed

The magwell mouth is bevelled into the one-piece frame rather than being an add-on funnel, and it is generous enough to guide a magazine in without being so wide it snags on a belt. Getting a 1911 to feed reliably from a Glock magazine is the hard engineering here, and the feed ramp and breech face geometry are where that problem was solved.

Aluminium Versus Steel

7075 is the aerospace grade, considerably stronger than the 6061 used in a lot of firearm parts. It is still aluminium, so it will show holster and edge wear sooner than steel and it does not soak up recoil the way a steel frame does. What you get back is weight, which matters if the gun is going on a belt.

Component	Specification	Benefit
Frame and grip	One piece 7075 aluminium	No joint to loosen, cut checkering
Magazines	Glock 17 or SIG P320	$25 magazines instead of $70
Barrel	5in Government or 4.25in Commander	Bench gun or belt gun, your call
Grip profile	Slimmer front to back than standard 2011	Better for smaller hands
Manufacture	Machined in house in the USA	Short chain if something needs fixing

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How It Compares

Staccato HD ($2,461+)

The obvious rival, because the HD line also takes Glock 17 magazines and it comes with a decade of duty history the Platypus cannot match. It costs a few hundred more and it has a support network on every corner.

If the Glock magazine compatibility is the only reason you were looking at the Platypus, buy a Staccato instead and get the track record too. Our best Staccato pistols guide covers the range.

Bul Armory SAS II ($1,850+)

Similar money, similar aluminium-frame philosophy, and considerably easier to actually buy. The Bul runs proprietary magazines, which is the exact problem the Platypus exists to solve, but its machining and trigger are a step up.

Pick the Bul if you want the better gun and will live with the magazine cost. Pick the Platypus if the magazines are the reason you are here. Our Bul Armory SAS II review has the detail.

Tisas 1911 Duty DS ($674+)

A third of the price and a completely different proposition. The Tisas gets you onto the platform cheaply with proprietary magazines and a trigger that needs work. If you are not certain you want a 2011 at all, start there. Our Tisas 1911 Duty DS review covers it.

Kimber 2K11 ($1,649+)

Cheaper than the Platypus at the entry point and vastly easier to find, because Kimber has distribution in every state and a dealer network built over decades. It is also the better looking gun, and the high polish Coyote PVD finish is in a different league to the Platypus’s plain working black.

The 2K11 runs proprietary magazines and it is a full size steel competition pistol rather than a lighter aluminium-framed one. So the comparison comes down to what you actually want. If you want a beautiful gun you can buy on Saturday, the Kimber wins comfortably. If the magazine ecosystem and the one-piece aluminium frame are the reason you are reading this, the Kimber does not answer either.

Verdict: the Platypus wins on one specific axis and loses on availability. If Glock magazine compatibility in an aluminium-framed 1911 is what you want, almost nothing else offers it at this price.

Buying One Is the Hard Part

This is where honesty matters more than enthusiasm. Almost nobody stocks a Platypus. Our live pricing usually surfaces one or two retailers against ten or more for a Staccato, and that is not a data problem, it is the reality of a small American shop building to order.

Lead times run 10 to 12 weeks on a solid colour custom build and stretch to 17 to 19 weeks on backfilled orders. If you order one in January you may be shooting it in May. Standard black configurations turn up on dealer shelves occasionally and used examples appear from time to time at a few hundred less.

You almost certainly will not get to handle one first. That is the single biggest practical objection to this gun, and if it stops you, it stops you. Buy from somewhere with a sane return policy.

Known Issues and Things to Check

• Magazine condition matters: the one stoppage we had traced to a tired fifteen year old Glock magazine. Retire worn springs and it runs clean.
• Holster fit: a Platypus is not a common holster cut. Check your maker supports it, or order from one of the kydex shops that lists it by name.
• Aluminium wear: the frame will show holster and edge wear sooner than steel. Cosmetic rather than structural.
• Lead times: custom orders are measured in months. Order the standard configuration if you want it sooner.
• Resale: a small brand with low recognition sells slowly. Buy it to keep, not to flip.

Who Should NOT Buy This Gun

• Anyone who needs a gun this month: lead times run into months on custom orders. Buy a Bul Armory SAS II or a Springfield Prodigy, both of which are actually in stock somewhere.
• The buyer who wants a duty record: the Platypus has no agency history behind it. Get a Staccato HD, which also takes Glock magazines and has the track record.
• Anyone who must handle before buying: you will not find one on a shelf to try. If that is a dealbreaker, the Kimber 2K11 is in far more shops.
• The shooter watching resale value: low brand recognition means slow sales and soft prices. A Staccato holds value far better.
• Anyone new to single action carry: this rides cocked and locked. Get training on a thumb safety first, or carry a striker fired pistol until you have.

Final Verdict

The Platypus is a one-idea gun, and the idea is a good one. Take the platform everyone wants, remove the running cost that annoys everyone who owns one, and machine it properly in America. On that specific measure it delivers exactly what it promises.

What it cannot do is be easy to buy. A small shop building to order will never have the availability of a company with national distribution, and no amount of engineering fixes that. You are trading convenience for a feature nobody else offers at this price.

There is one more thing worth saying. The 2011 market has spent three years getting cheaper and more crowded, and almost all of that competition has been about price. The Platypus is the rare gun competing on an idea instead, and whatever else you think of it, that deserves a look.

Buy it if you already own Glock magazines by the box and the idea of buying 2011 mags at seventy dollars a piece genuinely irritates you. See how it lines up against the rest of the field in our best 2011 pistols guide, or read 1911 vs 2011 if you are still working out whether the platform is for you.

Final Score: 8.4/10 – Solves the 2011’s most annoying problem properly, if you can wait for one.

FAQ: Stealth Arms Platypus