Exacting construction and rigorous durability are the standard for every weapon system that comes off the line at BCM. BCM Professional Grade Weaponry are hard use tools, built to perform in combat where unfailing performance is the only standard for men and machine. Features: Action: Semi-Auto Caliber: 5.56 NATO Capacity: 30 + 1 Magazines: One Barrel Length: 16 Inches Handguard: 12" BCM QRF Quad Rail Twist: 1:7 Charging Handle: BCM Mod4 Stock: BCM SOPMOD Gas Length: Mid-Length Trigger: BCM PNT Color: Black