Lighter yet stronger, the Barrett M107A1 is a high-performance rifle that is a shocking 5 lbs lighter than the original M107. Designed to be suppressor-ready, the M107A1 features an all new bolt carrier group, a steel four-port cylindrical muzzle brake, lightweight aluminum upper receiver with integrated 27 MOA optics rail, thermal-guard cheek piece, a rail-mounted aluminum rear grip, adjustable monopod, and an aluminum recoil buffer system.