By Rusty S.
Blowback Banshee CMMG’s Mk57 series is their line of 5.7x28mm firearms. Their “Banshee” model incorporates their shortest barrel in the caliber (5″), as well as a Tailhook PSB. All Mk57 models use CMMG’s Patent Pending Radial Delayed Blowback (RDB) system found in their GUARD models. The RDB blowback bolts have a head that is forced […]
Source:: The Firearm Blog