This Mk4 BANSHEE features a 5-inch barrel and has been designed to extract the full ballistic performance expected of the 10mm cartridge. This ultra compact pistol has a quick deploying RIPBRACE, an EML handguard, and stylized receivers. This powerhouse is built on the Mk4 ï¿½ AR-15 platform which uses a standard AR-15 lower receiver and newly designed 5.7x28mm AR conversion mags. To help reduce recoil and bolt weight, CMMG has incorporated their Radial Delayed Blowback system. Every aspect of this pistol has been designed to give users the ultimate Personal Defense Weapon (PDW).