This DPMS AP4 A3 AR-15 Upper Receiver Assembly comes fully assembled and ready to install on any standard small pin mil-spec lower receiver. Perfect for those searching for a lightweight economical upper configuration with the styling of the military's M4 carbine this Forged 7075-T6 Aluminum A3 upper's Flat-Top Picatinny Rail also provides maximum versatility in terms of a shooter's preferred sighting arrangement including fixed or flip-up rear iron sights and/or virtually any rail-mountable optic.

This upper comes equipped with a 16" M4 Contour Barrel machined from 4140 Chrome Moly Steel a true 5.56x45mm NATO chamber for use with either commercial or higher pressure military surplus ammunition and a versatile 1 in 9" Rifling Twist that is capable of stabilizing light- to medium-weight bullets of up to about 69 grains. Additional features include a Carbine-Length gas system forged A2 Front Sight Assembly with bayonet lug 2-Piece Glacierguard Handguards complete bolt carrier group charging handle forward assist shell deflector ejection port door and A2 Flash Hider.

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