This rifle has a 16" heavy barrel with 1x9 twist low profile gas block M4 stock 10" MLOK free float rail and A2 flash hider. The rifle also comes with 1 magazine and a CA approved gun lock.Features:Barrel: Chrome Moly Vanadium 16" Length 1x9 Twist Manganese Phosphated Phosphated under Low Profile Gas Block Threaded Muzzle A2 Flash Hider Heavy Profile M4 Feed RampsChamber: 5.56 x 45mmBolt & Carrier: Phosphated 8620 Steel Carrier Assembly HPT/MPI Tested Carpenter 158 Bolt Heat Treated and Plated Mil-Spec Chrome Lined Carrier Interior Carrier Key - chrome lined attached with Grade 8 Screws Properly Staked & Sealed Gas KeyHandguards: 10" MLOK Free FloatUpper Receiver: Forged 7075 T6 Aluminum Bore's Surface is coated with dry film lube over anodized surface M4 Feed Ramps Flat Top w/ White T-marks Hard Coat Anodized Mil-Spec Ejection Port Cover and Round Forward Assist Right Hand EjectionLower Receiver: Forged 7075 T6 Aluminum Hard Coat Anodized Mil-Spec Aluminum Triggerguard Mag Catch Button Semi-Auto A2 GripButtstock: M4 5 Position Mil-Spec Sized Tube H-BufferIncluded: 1 x 30rd Magazine Gun Lock Mako Rear SightWeight: 6.55 lbs. Empty Length: 36.37" Fully Extended 32.625 Collapsed