Adams Arms FGAA01366 P3 Complete Piston Upper 300 Blackout 12.50" Black Nitride Barrel, Aluminum Black Receiver, AARS M-LOK Handguard For AR-Platform The Adams Arms P3 Is The Performance, Match-Grade Model In The P-Series Lineup. The P3 features a Proof Research Carbon Fiber Wrapped Barrel, Jet Comp, Ambidextrous Charging Handle, Low Mass Carrier, An Ergonomic Free Float Rail, And Our Signature P-Series Micro Block Adjustable Piston System. This Upper Is manufactured And Ready To Compete With Any Other Long Range, Precision AR On The Market. Type: Complete Caliber: 300 Blackout Sights: None, Optic Ready Barrel Length: 12.50" Barrel Material: Carbon Fiber Twist: 1:7" Barrel Description: Carbon Fiber Wrapped Barrel Finish: Black Nitride Receiver Finish: Black Handguards: AARS M-LOK Handguard Finish: Black Barrel Length Range: 12" To 12.99"