CMMG BANSHEE in the caliber that won two World Wars and inspired the creation of the Radial Delayed Blowback system. Like all of our .45 ACP pistols and rifles, this BANSHEE is built on the MkG platform and is designed to use Glock-pattern .45 ACP magazines. With full length M-LOK slots on both sides and the bottom of the handguard as well as M-LOK between the top picatinny rail sections. MkG Radial Delayed Blowback Operating System has revolutionized pistol caliber ARs across the entire CMMG lineup. As a result of meticulous engineering, Radial Delayed Blowback not only addressed some operational concerns with a traditional straight blowback system, but it also delivered pistol caliber carbines and personal-defense weapons with softer recoil impulses and lighter weight bolt carrier groups and buffer systems than straight blowback systems could deliver.