New For 2021: Cosaint Arms COS21

by
posted on July 10, 2021
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Cosaint21

Cosaint Arms, an American pistol manufacturer headquartered in Flat Rock, NC, announced it will offer a double-stack, Commander-size variant of John Browning’s M1911 pistol chambered for 9 mm Luger. The new COS21 from Cosaint Arms is a hybrid 1911 that features the company’s modular system.

The synthetic material used to manufacture the grip frame of the COS21 pistol provides a lighter-weight design with increased ammunition capacity. Consaint Arms partnered with MBX for its American-made 126 mm magazine with capacity for 20 rounds of 9 mm Luger. Two magazines are included with each COS21 pistol.

Cosaint Arms relies on anodized 7075 aluminum for its frame assembly that is the foundation for the gun’s slide and grip frame. In addition, the aluminum frame supplies a Picatinny rail for accessories. The grip frame features a stippled grip for enhanced purchase, and a trigger guard with texturing on its front face comes standard. Cosaint Arms supplies a single, left-side safety lever and extended magazine release actuator. An upswept, extended beavertail grip safety with an extended memory bump comes standard, too.

Accuracy for the Commander-length COS21 is aided by a supplied 4.25” bull barrel and fiber-optic pipe dovetailed to the front of the steel slide. A square-notch rear sight comes standard that features a racking ledge for tactical applications. Cerakote Tungsten and Black finish is supplied to add longevity by providing added corrosion resistance.

MSRP for the COS21 9 mm pistol is set for $2,000. To learn more about the COS21 double-stack 1911, please visit cosaintarms.com.

Latest

Red Dot Occlusion 4
Red Dot Occlusion 4

Red-Dot Occlusion Training: A Performance-Booster for You & Your Optic-Equipped Handgun

Red-dot occlusion is a passive technique that shooters can use to remain target-focused, thereby speeding up their performance with optic-equipped handguns.

New for 2026: Dead Air Nomad Ti Over-The-Barrel (OTB) Suppressor

The Dead Air Silencers Nomad Ti OTB is designed to be a compact and lightweight suppressor for the backcountry hunter.

I Carry: Diamondback SDR in a Galco Hornet Holster

For our latest "I Carry" episode above, we paired the six-round Diamondback SDR DA/SA snubnose revolver with a simple leather holster from Galco, along with one of the latest EDC flashlights from Streamlight.

The Armed Citizen® May 8, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Creating the Ideal First-Time Shooting Experience

That first time behind a trigger can shape a newcomer’s attitude towards firearms. Here are five ways to make the experience a success.

Henry Repeating Arms Founder & CEO Honored as Law Enforcement Supporter of the Year

Henry Repeating Arms founder and CEO Anthony Imperato has been named Law Enforcement Supporter of the Year by New York State Fraternal Order of Police Memorial Lodge 100.

Interests



Get the best of American Rifleman delivered to your inbox.