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About this part
The Adams Arms P2 Adjustable Complete Upper 5.56 - 7.5" is a 7.5" 5.56 / .223 upper receiver from Adams Arms. One store lists it, Rainier Arms at $976.49.
The Adams Arms P2 model is the tactical, battle-ready model in the P-Series lineup. The P2 model includes an ergonomic free float rail that covers the all new P-Series Micro Block piston system. This upper features a Manimal flash hider and ambidextrous charging handle. The P2 is your off-the-shelf, tactical model that is configurable for any type of shooter. SPECS: Upper Receiver: A4 Flat-Top, Forged Barrel Length: 7.5" Barrel Contour: Heavy Barrel Material: 4150 Chrome Moly Vanadium Steel Muzzle Thread Pattern: 1/2"-28 Chrome Lined: No Barrel Finish: QPQ Melonite / Black Nitride Twist Rate: 1 in 7" Chamber: 5.56x45mm NATO M4 Feed Ramps: Yes Bolt Carrier: Full-Auto Rated 1-Piece w/Integral Piston Strike Face Muzzle Device: Manimal Extended A2 Flash Hider Gas System Length: Pistol, Short Stroke Piston Operated Gas Block Diameter: 0.750" Handguard: Adams Arms M-LOK Rail System Sights: NoneAdjustable Gas Block Weight: 3.54 lbs