Bushmaster M4 Patrolman's Flat Top-CA AR15 Rifle - Black | 5.56NATO | 16" Barrel | M4 Handguard | A2 Flash Hider | M4 Collapsible Stock | Flip-Up Rear Sight | Fixed 10rd Mag | CA Compliant

Specifications: - Caliber 5.56 NATO (.223 REM) -16" Barrel with a 1:7 Twist Rate - Overall length: 32.5 - 36"  - M4 Style Handguard with Detachable Carry Handle - Salt Bath Nitride MPI Bolt Carrier Group - A2 Birdcage Flash Hider 1/2 x 28    Features:  - Equipped with a DFM® magazine -Trigger assembly is mil-spec -The gas system is carbine length -6 Position collapsible stock for ease of adjustment and precise fit -7075 Forged A4 Flat top, with Flip Up Rear Sight  - F-Marked sight base for sight alignment, providing correct carbine sight alignment  This is a California Compliant Model