The CMMG Banshee in .40 S&W uses the Radial Delayed Blowback system to handle the .40 S&W cartridge, which presents higher pressure challenges than 9mm. Compatible with Glock 22/23-pattern magazines via a CMMG adapter. The 16-inch barrel extracts additional velocity from the .40 S&W cartridge. CMMG's Banshee in .40 is one of the few factory AR-format .40 S&W carbines available. Type: Pistol Caliber Carbine Action: Semi-Automatic Caliber: .40 S&W Capacity: 28 Year introduced: 2019, USA Weight: 68 oz Overall length: 33.5" Status: Active Intended use: Home Defense, Competition, Range Use