CMMG Banshee 200 MK4 9mm, Armor BlackDescription The CMMG BANSHEE series has a number of 9mm AR pistols built on a few different platforms. The Mk4 platform this BANSHEE is built on has a standard AR15 pattern lower receiver and utilizes our 9mm AR conversion magazines. While not only having the same manual of arms as any AR15, you can convert your existing stash of PMAGs to 9mm using our 9 AR conversion adapters. Available in a variety of Cerakote finish options, the BANSHEE series