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

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...

Kahr's K9 9mm pistol is a quarter-century old, and to commemorate the milestone the company is producing a limited-edition 25th anniversary K9. Industry

Kahr 25th Anniversary K9

J. Scott Rupp - July 19, 2019

Kahr's K9 9mm pistol is a quarter-century old, and to commemorate the milestone the company is...

See More Recommendations

Popular Videos

All About Handgun Ammo

All About Handgun Ammo

Rich and Jim get into the nitty gritty of the FBI ammo protocol, firing into various barriers to illustrate what can happen to a bullet.

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.

Dealing with Subcompacts

Dealing with Subcompacts

Jim and Rich cover the benefits and the challenges presented by very small pistols.

See more Popular Videos

Trending Stories

In 1858 Beals invented and patented a spur-trigger, single-action, percussion revolver. The unique Revolvers

Remington Timeline: 1858 - Beals Revolver

Handguns Online Staff - September 09, 2016

In 1858 Beals invented and patented a spur-trigger, single-action, percussion revolver. The...

I don't have a distinct recollection of the first time I reloaded a cartridge – it's been a long Ammo

To Cast a Good Bullet

Bart Skelton - June 28, 2012

I don't have a distinct recollection of the first time I reloaded a cartridge – it's been a...

Kahr Arms officially broke ground on their new headquarters in Blooming Grove Township, in Pike Industry

Kahr Arms Breaks Ground on New Pennsylvania HQ

Handguns Online Staff - June 04, 2014

Kahr Arms officially broke ground on their new headquarters in Blooming Grove Township, in...

See More Stories

More Semi-Auto

The American-made CZ P-10 F Optics-Ready 9mm is ready to take on the heavy hitters. Semi-Auto

CZ P-10 F Optics-Ready Review

Brad Fitzpatrick - August 21, 2019

The American-made CZ P-10 F Optics-Ready 9mm is ready to take on the heavy hitters.

Stoeger is entering uncharted territory for the brand with the STR 9, but it's obvious this gun was well thought out and engineered. It manages to maintain a reasonable price and yet still performs and functions the way most shooters demand. Semi-Auto

Stoeger STR 9 Review

Brad Fitzpatrick - October 16, 2019

Stoeger is entering uncharted territory for the brand with the STR 9, but it's obvious this...

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...

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.