DPMS AP4 A3 Upper Receiver Assembly for AR-15 5.56x45mm NATO 16" Barrel Black No Handle

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.

Technical Information

• Upper Receiver: A3 Flat-Top
• Barrel Length: 16"
• Barrel Contour: M4
• Barrel Material: 4140 Chrome Moly Steel
• Muzzle Thread Pattern: 1/2"-28
• Chrome Lined: No
• Barrel Finish: Parkerized
• Twist Rate: 1 in 9"
• Chamber: 5.56x45mm NATO
• M4 Feed Ramps: Yes
• Muzzle Device: A2 Flash Hider
• Gas System Length: Carbine
• Gas Block Diameter: 0.750"
• Handguard: 2-Piece Polymer Glaciergaurd
• Sights: A2 Fixed Front, No Rear
• Bolt Carrier Assembly Included: Yes
• Bolt Carrier Type: Commercial