CMMG Banshee 300 MKGS 9mm Pistol for Sale – Ultra-Compact AR-Pistol Performance

At Weapons Ammo Reloaded, we present the CMMG Banshee 300 MKGS 9mm Pistol for sale—a cutting-edge, short-barreled powerhouse that blends the controllability of an AR with the compact versatility of a PCC. Designed for home defense, tactical applications, and range dominance, the Banshee 300 MKGS features CMMG’s patented Radial Delayed Blowback system, delivering smoother recoil and unparalleled reliability in a ultra-maneuverable package.

Key Features

• Radial Delayed Blowback System – Reduces felt recoil by 40% vs. direct blowback (patented dual-lug bolt design)
• Ultra-Compact 5″ Barrel – 1:10 twist optimized for 9mm +P, threaded 1/2×28 (suppressor-ready)
• MKGS Handguard – M-LOK compatible, slim-profile for maximum accessory mounting
• Ambidextrous Controls – Includes bolt release, safety, and magazine catch
• EndoMag™ Compatibility – Uses 9mm-converted AR-15 mags (or Glock mags with optional lower)
• SB Tactical Brace – Adjustable for stability while maintaining pistol classification

Specifications

• Caliber: 9mm Luger (compatible with +P)

• Barrel Length: 5″ (threaded 1/2×28)

• Overall Length: 21.5″ (collapsed) / 24.75″ (extended)

• Weight: 4.6 lbs (unloaded)

• Magazine Capacity: 30+1 (included, EndoMag insert)

• Receiver: Forged 7075-T6 aluminum (Type III hardcoat)

• Fire Control: Single-stage mil-spec trigger (3.5-4.5 lb pull)

Why the Banshee 300 MKGS?

• No More Bolt Bounce – Radial delay eliminates reliability issues of traditional blowback

• Quieter Suppressed – Delayed action reduces port pop (ideal with 9mm cans)

• AR-15 Ergonomics – Familiar controls with PCC firepower

• Modular Flexibility – Swap uppers for .40 S&W, 10mm, or .45 ACP

Perfect For

• Home Defense – Compact size + 9mm terminal performance

• Vehicle/Truck Gun – Fits in tight spaces

• Competition Shooting – Dominates PCC divisions

• Suppressed Use – Tri-lug or direct-thread options

Included

• (1) 30-round EndoMag (PMAG body)

• SB Tactical SBA3 brace

• Thread protector

The CMMG Banshee 300 MKGS redefines the AR-pistol category—available now at Weapons Ammo Reloaded.

Product Information