The Heart Of Every Bushmaster M4 Patrolman's. Partnering with Franklin Armory to add their Binary Firing System III to Bushmaster's all-new rifles. The BFSIII is a three-position trigger allowing the third position to fire one round on pull and one on release. - Specifications: - Caliber 5.56 NATO (.223 REM) - 16 Barrel with a 1:9 Twist Rate - Overall length: 32.5-36 - M4 Style Handguard with Detachable Carry Handle - Salt Bath Nitrate MPI Bolt Carrier Group - A2 Birdcage Flash Hider 1/2 x 28 - Trigger Positions: - Safe- Will not fire - Semi- Fires 1 round per pull - Binary- Fires 1 round on pull and 1 round on release - Features: - Equipped with a Bushmaster 30 Round Aluminum Magazine - The gas system is carbine length - 6 Position collapsible stock for ease of adjustment and precise fit - 7075 Forged A4 Flat top with detachable carry handle - F-Marked sight base for sight alignment providing correct carbine - BFSIII Trigger allows for competition tactical and recreational shooters