The CMMG Banshee in 9mm uses CMMG's Radial Delayed Blowback (RDB) system — a rotating bolt that delays opening by bearing against ramps in the receiver rather than locking into the barrel extension. This reduces bolt carrier velocity and felt recoil compared to straight blowback, allowing a lighter BCG and less buffer weight. It accepts Glock 17/33-round magazines and ships with a pistol brace. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 33 Year introduced: 2018, USA Weight: 88 oz Overall length: 22" Status: Active Intended use: sporting, home_defense, competition