<p>CALIBER: 7.62 x 51mm NATO BARREL LENGTH: 20″ WEIGHT: 8.75 lbs (3.97kg) MUZZLE THREADS: 5/8 x 24 TPI RIFLING: 1/10″ RH • Forged lower receiver • LWRCIâ„¢ Monoforgeâ„¢ Upper Receiver is stronger and lighter — increased rigidity = improved accuracy • 20 position gas block for maximum tuning of attachments and ammo • Geissele SSA-E trigger • Magpul UBR stock • LWRCIâ„¢ Patented Short Stroke Gas Piston system for unparalleled reliability • Top Side Ambidextrous Charging handle same length as standard AR 10 • LWRCIâ„¢ Cold-Hammer-Forged, N” Modular Rail System. Removable top-rail with 100% return to zero, no tool re-installation. Allows for quick access to piston system • Fully Ambidextrous Lower Controls: Mag Release, Bolt Catch & Release, and Selector • Upper and Lower receivers machined from billet aluminum delivering rugged durability and lighter weight • LWRCIâ„¢ Skirmish Back Up Iron Sights • Surefire® SFMB suppressor adapte</p>