DPMS AR-15 A3 Upper Receiver Assembly 5.56x45mm NATO 20" Barrel A2 Handguard

Product #: 537768 DPMS #: BA-A3AS UPC #: 884451001768
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  • Information
This DPMS 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 wanting to build a full length 20" rifle to harness its increased velocity and sight radius benefits, 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. Carry handles, fixed or flip-up rear iron sights, variable power or red dot optics are all compatible and interchangeable at the shooter's option.

This upper comes equipped with a 20" Heavy 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 full length A2 polymer handguards with heat shield, a forged A2 front sight assembly with bayonet lug, 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: 20"
  • Barrel Contour: Heavy (HBAR)
  • 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: Rifle
  • Gas Block Diameter: 0.750"
  • Handguard: 2-Piece Polymer, A2-Style w/Heat Shield
  • Sights: Fixed A2 Front, No Rear
  • Bolt Carrier Assembly Included: Yes
  • Bolt Carrier Type: Commercial

NOTE: All DPMS upper receivers are factory test fired for functionality before shipment.

Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.

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