This Adams Arms P1 Mid Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation onto any standard AR-15 lower receiver. The Base Mid upper comes equipped with a 16″ melonite-finished barrel, A2 flash hider, bolt carrier group, charging handle, picatinny rail gas block, delta ring assembly and Magpul MOE handguards. Additional features include a forged A3 flat-top configuration that’s ready to accept the shooter’s choice of optic and/or rear iron sight, M4 feed ramps to help ensure reliable feeding and functioning during rapid strings of fire, and a mid length gas system for a smoother recoil impulse click here and longer sight radius.

Also check here referred to as salt bath nitriding, this treatment produces an extremely hard, slick surface more info on steel that resists carbon adhesion and increases corrosion resistance, extending a barrel’s service life by reducing the friction produced inside the bore upon firing for a net decrease in bore surface wear over time. Nitriding converts the barrel steel’s surface without any build-up, retaining all of the benefits of traditional chrome lining without suffering the accuracy degradation commonly encountered with it due here to the uneven application of chrome inside the barrel’s bore. The end result is a barrel that’s capable of producing accuracy on par with a match stainless steel tube, while also here exhibiting the longevity and resilience of a chrome lined, mil-spec barrel.

Features
Magpul MOE handguard
16″ QPQ melonite barrel
A2 flash hider