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RSR Stock #: CMMGPT-57A1843-GB
Manufacturer Part #: PT-57A1843-GB
UPC: 810046233689

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CMMG, Banshee 300, Mk57, Pistol, Semi-automatic, 5.7x28mm, 5" Barrel, Threaded 1/2x28, Graphite Black Cerakote Finish, Magpul MOE Pistol Grip, Pistol Receiver Extension, RML4 M-Lok Handguard, 21 Rounds, Thread Protector


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to


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  • CALIBER: 5.7x28
  • BARREL: 5" MT 4140CM SBN, 1:9 Twist, 5.7x28mm
  • MUZZLE: Thread Protector, Threaded 1/2-28
  • RECEIVER: Forged 7075-T6 AL Lower, Forged 7075-T6 AL Upper
  • HAND GUARD: CMMG RML4 M-Lok hand guard
  • FINISH: Cerakote
  • CHARGING HANDLE: CMMG Oversized Ambi
  • RECEIVER EXTENSION: CMMG Pistol Receiver Extension w/Ambi Sling Plate
  • TRIGGER: CMMG Single stage mil-spec style trigger
  • TRIGGER GUARD: Integrated Into Lower
  • MAGAZINE: Pro Mag 20rd
  • WEIGHT: 4lbs 7oz (unloaded)
  • LENGTH: 19.8"

Product Description

CMMG delivers its lightest and most compact firearms within the BANSHEE line of Short Barreled Rifles (SBR's) and AR pistols. Don't let these little guys fool you though. With a wide range of caliber offerings available, there's plenty of firepower in the BANSHEE line. All BANSHEE 300 series firearms are the shortest configuration that CMMG makes in their respective caliber.