DPMS AR-15 A3 Flat-Top Upper Assembly 5.56x45mm NATO 1 in 9" Twist 20" Barrel Chrome Moly Matte with A2 Handguard, A2 Front Sight

Product #: 120468 DPMS #: BA-A3AS-20P UPC #: 8445100159
Please Sign In or Create an Account to use this feature.
  • 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, bolt carrier group, charging handle, forward assist, shell deflector, ejection port door and target crown.

NOTE: This upper assembly comes without a bayonet lug and lacks muzzle threading for legal compliance in states where such features are restricted.

Technical Information
  • Upper Receiver: A3 Flat-Top
  • Barrel Length: 20"
  • Barrel Contour: Heavy (HBAR)
  • Barrel Material: 4140 Chrome Moly Steel
  • Muzzle Thread Pattern: None, Target Crown
  • Chrome Lined: No
  • Barrel Finish: Parkerized
  • Twist Rate: 1 in 9"
  • Chamber: 5.56x45mm NATO
  • M4 Feed Ramps: Yes
  • Muzzle Device: N/A
  • Gas System Length: Rifle
  • Gas Block Diameter: 0.750"
  • Handguard: 2-Piece Polymer, A2-Style w/Heat Shield
  • Sights: Modified A2 Front (No Bayonet Lug), No Rear

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

Was this information helpful? Yes No

Thank you! Your valuable feedback helps improve our product information and offering.

Help Us Improve

Please enter the missing required fields:

    Do you accept our terms and conditions? *
    Know someone who may like this? Email this Page to a Friend

    Customer Reviews

    The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.

    NOTE: Prices, specifications and availability are subject to change without notice. We reserve the right to correct typographic, photographic and/or descriptive errors.