CMMG 10mm Banshee Mk10 First Look

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

CMMG has released the 10mm Banshee 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 10mm Banshee 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-AR
CMMG 10mm Banshee Mk10 300 Series (Photo courtesy of CMMG)

The 10mm Banshee 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 10mm Banshee 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

The Model 700 PCR is a long-range rig built for punching paper, ringing steel, and hammering hogs, deer, and coyotes. Rifles

Review: Remington Model 700 PCR

Sam Wolfenberger - April 15, 2019

The Model 700 PCR is a long-range rig built for punching paper, ringing steel, and hammering...

With everything from new riflescopes through red-dot handgun sights to rangefinding binoculars, there are plenty of fresh new optics for 2019. Optics

30 New Optics for 2019

Steve Gash - August 23, 2019

With everything from new riflescopes through red-dot handgun sights to rangefinding...

A half-century in the making, the new DGX Bonded is Hornady's best-ever dangerous-game bullet. Ammo

Danger Tamed: Hornady DGX Bonded Hunting Ammo

Joseph von Benedikt - May 23, 2019

A half-century in the making, the new DGX Bonded is Hornady's best-ever dangerous-game bullet.

See More Recommendations

Popular Videos

Black Hills Evolution of Rifle Cartridge: .308 Win. 175 Gr. Match

Black Hills Evolution of Rifle Cartridge: .308 Win. 175 Gr. Match

David Fortier talks with Jeff Hoffman of Black Hills Ammunition about the evolution of the .308 Win. 175 Gr. Match bullet.

The Future Of Special Operations Small Arms

The Future Of Special Operations Small Arms

We're taking a look at what the Army's Elite Units are using for service rifles and what the future of SOCOM sniping looks like.

All About .300 Blackout

All About .300 Blackout

The .300 Blackout is here to stay, and we take some time to look at new technology surrounding this cartridge. Next, we pit subsonic rivals against each other before stretching the legs of this CQB round out to 600 yards from a short 9-inch barrel.

See more Popular Videos

Trending Stories

The Model 700 PCR is a long-range rig built for punching paper, ringing steel, and hammering hogs, deer, and coyotes. Rifles

Review: Remington Model 700 PCR

Sam Wolfenberger - April 15, 2019

The Model 700 PCR is a long-range rig built for punching paper, ringing steel, and hammering...

Shooting Times editor Joel Hutchcroft provides a comprehensive list of ideal Father's Day gifts. Accessories

Shooting Times Father's Day 2019 Gift Guide

Joel J. Hutchcroft - May 07, 2019

Shooting Times editor Joel Hutchcroft provides a comprehensive list of ideal Father's Day...

Harvey A. Donaldson may be best known for his .219 Donaldson Wasp wildcat cartridge, but during his lifetime he was popularly called the “pioneer benchrester.”  Gunsmithing

Harvey Donaldson: Pioneer Benchrester

Joel J. Hutchcroft - May 07, 2019

Harvey A. Donaldson may be best known for his .219 Donaldson Wasp wildcat cartridge, but...

See More Stories

More Handguns

The 9mm Falcon Double Stack has a 7075 aluminum frame, a steel slide with a 5.0-inch match-grade barrel, and a steel bushing. Handguns

Review: Nighthawk Custom Falcon Double Stack 9mm

Joel J. Hutchcroft - April 25, 2019

The 9mm Falcon Double Stack has a 7075 aluminum frame, a steel slide with a 5.0-inch...

The .380 ACP might seem like an unusual chambering for a revolver, but the little Taurus 380 UL revolver has its advantages. Handguns

Taurus .380 ACP UL Revolver Review

Brad Miller, PhD - August 27, 2019

The .380 ACP might seem like an unusual chambering for a revolver, but the little Taurus 380...

Pistoleros can rejoice with new offerings from Ruger, Glock, Sig Sauer, Kimber and more. Handguns

32 New Handguns for 2019

Joel J. Hutchcroft - July 01, 2019

Pistoleros can rejoice with new offerings from Ruger, Glock, Sig Sauer, Kimber and more.

See More Handguns

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.