Chambering: 6mm ARC. Geissele Freedom Rifle (GFR). Barrels: 14.5", 16", 18", 20", chrome-lined, precision machined, cold hammer-forged. Geissele Anti-Strike Super Compact Gas Block, GFR-E trigger. Nanoweapon-coated 6mm ARC-enhanced bolt carrier group, chrome-lined gas key with staked screws, advanced tool-steel cam pin, extended carrier rails, and 6mm ARC GFR Stressproof Bolt. GFR uppers have properly heat-treated stainless steel cam races. It has an ambidextrous Geissele Super Charging Handle, and a HUXWRX Flash Hider-QD 6MM ARC suppressor-ready muzzle device. Nanoweapon-coated HUXWRX Flash Hider-QD muzzle device. MK16 Super Modular Rail, Super 42 Buffer system. One eight-round Geissele 6mm ARC magazine. It was introduced in 2022. Add 2% for the 20" Stratomatch model.