CMMG Banshee 10mm Mk10 First Look

CMMG Banshee 10mm Mk10 First Look
CMMG Banshee 10mm Mk10 300 Series (Photo courtesy of CMMG)

CMMG has announced the Banshee 10mm Mk10 with a Radial Delayed Blowback operating system and Last-Round Bolt Hold Open; the bar has been raised when it comes to innovating the AR to handle powerful cartridges like the 10mm.

Built into the Banshee 10mm Mk10 is CMMG’s innovative Radial Delayed Blowback operating system incorporates a mechanical delay that forces the bolt to rotate, momentarily slowing the bolt carrier group, which allows chamber pressures to fall before cycling. This mechanical delay allows for reliable function with a wide variety of ammunition and removes the need for a heavy bolt, buffer and spring typically required in direct blowback systems. Radial Delayed Blowback significantly cuts felt recoil and directs more gas down the barrel, which results in cleaner function and real advantages when using a suppressor. Radial Delayed Blowback also reduces bolt velocity, keeping you on target for faster follow-up shots.

“From the moment we first introduced the Radial Delayed Blowback operating system back in 2017, our customers have repeatedly requested that we use this innovative system to chamber 10mm,” said Chris Reinkemeyer, CEO/CFO at CMMG. “We are proud to say that we have now answered the call. Not only do our 10mm offerings work with the wide range of ammunition available today, they also tame the felt recoil by a significant margin.”

CMMG developed a unique Bolt Catch Linkage System (U.S. Pat. No. 9952011) in order to allow the Last-Round Bolt Hold Open feature to be compatible with the 10mm and other pistol cartridges. The Bolt Catch Linkage System is dual pinned, precision machined, meticulously engineered and field-tested to consistently lock the bolt back after the last round of each magazine. This feature provides familiarity for AR users while changing magazines for faster re-loads.

CMMG Banshee 10mm Mk10
CMMG Banshee 10mm Mk10 300 Series (Photo courtesy of CMMG)

The Banshee 10mm is offered with an 8-inch barrel, starting at 5 pounds, 9 ounces (unloaded) and an overall length of just 24.3 inches. One 30-round factory SGM TACTICAL 10mm magazine (GLOCK compatible) ships with the firearm where allowed. To maximize performance and reduce recoil for the varying power levels of 10mm ammunition, the Banshee 10mm (Mk10) ships with an H3 buffer pre-installed and an additional standard carbine in the box.


CMMG Banshee 10mm Mk10 Models

  • 100 Pistol, MSRP $1,299.95
  • 100 SBR, MSRP $1,349.95
  • 200 Pistol, MSRP $1,449.95
  • 200 SBR, MSRP $1,449.95
  • 300 Pistol, MSRP $1,649.95
  • 300 SBR, MSRP $1,649.95

It is no secret that 10mm cartridge has developed a following with its variety of loads and stopping power. CMMG has taken the 10mm to a new level, taming the cartridge with Radial Delayed Blowback, making the Banshee (Mk10) the ultimate platform for the 10mm.


Jeff Cooper developed the 10mm in 1983 to be the ultimate pistol cartridge that agencies were looking for. The original 10mm produced more than 600 pounds of energy while pushing a 170-grain hollow point at 1,300 feet per second. The overwhelming power and recoil of the 10mm cartridge proved too much with certain agencies, but with modern technological advancements in the firearm industry, hard-hitting calibers have experienced a surge in popularity, including the 10mm.


For more information, please visit: www.cmmginc.com

Recommended for You

Guns are fun, and cheap guns are even more fun. Spend less on the firearm and more on ammo with these 10 low-priced pistols. Compact

10 Cheap Guns Under $250

Evan Brune - September 24, 2015

Guns are fun, and cheap guns are even more fun. Spend less on the firearm and more on ammo...

The SIG SAUER P365 (model # 365-9-BXR3) may just be the subcompact 9mm against which all others will be judged. Compact

SIG P365 Review

James Tarr - October 31, 2018

The SIG SAUER P365 (model # 365-9-BXR3) may just be the subcompact 9mm against which all...

Mossberg dives into the CCW market with the MC1sc 9mm pistol (#89001), their first striker-fired semiautomatic. Semi-Auto

Mossberg MC1sc 9mm Pistol Review

Brad Fitzpatrick

Mossberg dives into the CCW market with the MC1sc 9mm pistol (#89001), their first...

See More Recommendations

Popular Videos

Performance Center M&P Shield M2.0

Performance Center M&P Shield M2.0

From Smith & Wesson, the M&P Shield M2.0 is a great option for a carry gun with optics option.

Going To The Range

Going To The Range

Jim and Scott show you how to make each trip to the shooting range a quality experience.

Teaching New Shooters

Teaching New Shooters

Julie Golob of Team Smith & Wesson guest stars, joining Jim and Scott for a discussion of how best to introduce new shooters to the sport.

See more Popular Videos

Trending Stories

The number of accessories and aftermarket upgrades for the SIG P320 is only going to increase. Accessories

SIG P320 Accessories and Upgrades

James Tarr - December 14, 2017

The number of accessories and aftermarket upgrades for the SIG P320 is only going to increase.

The SIG SAUER P365 (model # 365-9-BXR3) may just be the subcompact 9mm against which all others will be judged. Compact

SIG P365 Review

James Tarr - October 31, 2018

The SIG SAUER P365 (model # 365-9-BXR3) may just be the subcompact 9mm against which all...

Do you remember the first time you fired a gun? If you're like most, you were somewhat Training

Pro Tips For Controlling Recoil

Richard Nance - April 11, 2017

Do you remember the first time you fired a gun? If you're like most, you were somewhat

See More Stories

More Semi-Auto

The lines of the SIG P210 Target are clean, smooth and classic, and the finish is impeccable. Semi-Auto

The SIG P210 Target

Stan Trzoniec - June 07, 2019

The lines of the SIG P210 Target are clean, smooth and classic, and the finish is impeccable.

Hot on the heels of Mossberg introducing its first striker-fired handgun, the MC1sc, the company has come out with a two-tone version. Semi-Auto

New Mossberg MC1sc Two-Tone

J. Scott Rupp - August 07, 2019

Hot on the heels of Mossberg introducing its first striker-fired handgun, the MC1sc, the...

Mossberg dives into the CCW market with the MC1sc 9mm pistol (#89001), their first striker-fired semiautomatic. Semi-Auto

Mossberg MC1sc 9mm Pistol Review

Brad Fitzpatrick

Mossberg dives into the CCW market with the MC1sc 9mm pistol (#89001), their first...

See More Semi-Auto

GET THE MAGAZINE Subscribe & Save

Temporary Price Reduction.

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE

GET THE NEWSLETTER Join the List and Never Miss a Thing.