Shooting CMMG’s Newest Banshee: A 10mm AR Pistol

People have been asking for a 10mm pistol caliber carbine since the PCC movement started. The technological challenges are daunting, but CMMG has revolutionized PCC design.

The company’s new 10mm Auto Banshee is an accurate, soft shooting and highly reliable 10mm pistol or PCC available in a variety of packages fit for any budget.

The Banshee runs that punishing 10mm round without a hitch thanks to CMMG’s proprietary Radial Delayed Blowback action, which incorporates a mechanical delay that forces the bolt to rotate, slowing the bolt carrier group. This allows chamber pressures to drop before cycling, using a lighter bolt, buffer, and spring. The reduced bolt velocity reduces wear and recoil.

With 10mm recoil, the choice of an optic is difficult. Nikon’s P-Tactical SPUR reflex sight is built for close and medium range applications. Tiny but mighty, it is rugged enough to handle full power 10mm abuse and recoil.

I found the SPUR easy to set up and zero. Operation is intuitive and simple. It provides a quickly adjustable dot which is big enough to pick up quickly and small enough to be precise. Within ten rounds we were right on target at 35 yards,

I got to spend a range day with the guys from CMMG. We shot over 300 rounds of assorted weight 10mm from Doubletap ammo and Speer GoldDot. The gun ran great! And Nikon’s P-Tactical SPUR red dot sight produced very good accuracy.

One of the major problems gun makers face when tackling the 10mm is the diversity among factory loads. Weights, pressures and muzzle velocities vary from ammo company to ammo company.

CMMG solved this by giving the shooter options, as the Banshee ships with a five-ounce H3 buffer installed and a three-ounce standard carbine buffer is included in the box. This lets you quickly tune your rifle for maximum performance from your ammunition with and without a suppressor. If you need full power 10mm loads, there’s an eight-ounce buffer available.

Even with heavy loads, recoil is light. I would compare it to birdshot from a 12 gauge autoloader. The Banshee 10mm is 24.3 inches long with an adjustable arm brace and an 8-inch barrel. Weighing 5 pounds, 9 ounces, unloaded, the Banshee is easy to handle. It uses readily available Glock 10mm magazines in all capacities. And a clever last round bolt hold-open feature, the dual-pinned and precision-machined Bolt Catch Linkage System, lets you know when it is time to add another freedom stick.

The 10mm Auto, like many wonderful things, was developed by Colonel Jeff Cooper. Because of physics, the great stopping power of the 10mm produces recoil that can be difficult to manage in a handgun. Many shooters preferred lighter loads which resulted in the .40 S&W that fires a 10mm bullet in a shorter case. The CMMG Banshee lets you shoot full power loads that use all the potential energy from this great round without the heavy recoil that slows follow up shots.

CMMG offers three different series of Banshee pistols (100, 200, and 300 series). Calibers range from .22 LR to .458 SOCOM. The CMMG Banshee 100 Series pistols are basic and offer an affordable entry into the 10mm PCC market with an MSRP of $1,299.95 for the pistol and $1,349.95 for the SBR.

The upgraded 200 Series pistols and SBRs offer features like enhanced arm braces, and the line-topping 300 Series guns come with ambidextrous safety selectors and are available in a variety of Cerakote color options.

CMMG Banshee 200 Series 10mm pistols and SBRs carry an MSRP of $1,449.95 while the 300 series guns have an MSRP of $1,649.95. All Banshee pistols come equipped with 7075 T-6 receivers, M-LOK free float handguards, and SBN barrel finishes. All are backed by CMMG’s lifetime warranty.

To see the complete line of CMMG 10mm offerings, click HERE.

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About the author: Mark Miller is a former Customs Agent and a Green Beret who served in Afghanistan and a number of other live fire locations. A student of firearms and shooting, he is an FFL and a SOT. The guiding philosophy of his life is that terrain and situation dictate tactics and the enemy always gets a vote on any plan.

{ 8 comments… add one }
  • Wishooter December 27, 2020, 8:44 am

    Looks like I need another AR in my stable. I have an AR9 and it’s a joy to shoot, but I have this strange love affair with 10mm. It’s the 357 mag equivalent modern auto loading round. Magazines and reloading supplies are plentiful, I have a racegun in this caliber and it hits hard enough to kill large game at short range. Does what a 45 app can do but reaches out farther with higher magazine capacity.

  • Jet October 13, 2019, 12:17 pm

    I agree, I have purchased several really cool AR Pistols in 9 MM and even put the Maxium stabilizer on one and still was in it under 900 bucks.

  • Donald Hoyle October 11, 2019, 3:22 pm

    Listen Jeff Cooper was not responsible for the 10mm development, and my 10mm handgun kicks no more than my same model .45acp pistol!

    • Mark Miller October 14, 2019, 12:29 am

      The first mention I can find about the 10mm is an article by Jeff Cooper in the February 1981 issue of Guns and Ammo where he proposes the .40 cal G&A which became the 10mm.

      There is no science to perceived recoil, it is subjective. There are many loads for 10mm and some of them have much more energy than .45. My perception is that the hotter 10mm loads I have shot have considerably more recoil than my .45. Reduced loads have less recoil.

  • KMacK October 11, 2019, 2:10 pm

    Come on—that is NOT a Carbine! It’s a pistol. Carbines are shoulder arms, long arms (even if they’re short). Pistols are handguns.

  • Ralph manusk October 11, 2019, 9:16 am

    How about making a AR in 45 win.mag. It is a lot stronger than the 10mm.

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