The Geissele GFR 6mm ARC 20" Bbl Stratomatch Black Rifle 08-651B is a pinnacle of precision engineering, designed to elevate the AR15 platform to new heights. Featuring a 20-inch 416R stainless steel cut-rifled barrel, this rifle ensures exceptional accuracy and reliability. The barrel extension is specifically designed for the 6mm ARC cartridge, enhancing chambering and preventing projectile deformation. The rifle's optimized gas system and Strato Gas Block guarantee reliable performance under extreme conditions. The GFR-E trigger, an enhancement of the SSA-E™ trigger, offers a smooth first stage and a crisp break, even with minimal lubrication, thanks to Geissele's proprietary Nanoweapon Coating. At the heart of the rifle is the Nanoweapon Coated 6mm ARC Reliability Enhanced Bolt Carrier Group (REBCG), which provides increased corrosion and wear resistance, carrier stability, and optimized cartridge-feeding performance