The CMMG Banshee MkGs (CMMG part no. 40A330FAB) keeps .40 S&W alive and well in AR-pattern form, pairing an 8-inch barrel with a platform built around small-frame Glock-pattern magazines. .40 S&W remains a favorite of many shooters and law enforcement agencies for its balance of capacity and power, and this Banshee’s MkGs lower is purpose-built to accept 9mm/.40 caliber Glock-pattern magazines matched to the upper’s chambering. With a 22+1 capacity and CMMG’s Radial Delayed Blowback operating system, this Banshee delivers a soft-shooting, reliable pistol finished in CMMG‘s armor black.

Key Specifications

• Chambered in .40 S&W, a cartridge favored by many shooters and law enforcement for its balance of power and capacity.
• Holds 22+1 rounds per magazine using small-frame Glock-pattern magazines.
• Runs an 8-inch barrel for solid velocity retention without excess length.
• Cycles off CMMG’s Radial Delayed Blowback operating system for a softer recoil impulse.
• Wears a CMMG EML7 M-LOK handguard for a full-length accessory mounting surface.
• Equipped with CMMG’s Zeroed 60/90-degree safety for a shorter, faster selector throw.
• Includes CMMG’s RipBrace for a stable, adjustable shooting platform.
• Cycles in reliable semi-auto for controlled, repeatable follow-up shots.
• Weighs approximately 5.3 pounds unloaded, a manageable weight for the platform.

Frequently Asked Questions

What magazines does this Banshee use? It uses small-frame Glock-pattern .40 S&W magazines holding 22+1 rounds.

Is .40 S&W still a good defensive round? Yes, it remains a favorite among shooters and law enforcement for its balance of power and manageable recoil.

Does it include a brace? Yes, CMMG’s RipBrace ships installed on this Banshee.

Buy the CMMG Banshee MkGs Pistol, .40 S&W, 8-Inch, Armor Black

For shooters who never gave up on .40 S&W, this longer-barreled MkGs Banshee delivers full performance from the cartridge in a compact, Glock-magazine-fed AR pistol. Order it from our AR pistols lineup at our Lubbock, Texas gun shop for fast, insured shipping to your FFL.