DPMS AR-15 Mini SASS A3 Upper Receiver Assembly 5.56x45mm NATO

Product #: 164644 DPMS #: BA-MSASS UPC #: 884451001782
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Product Information

This drop-in upper will attach to virtually any standard AR-15 lower assembly. Comes complete with charging handle, bolt and bolt carrier assembly, it is ready to pin to a complete lower assembly without modification. This upper is a Flattop that features a four rail free float tube with rail covers, front and rear flip-up sights and Panther flash hider. Free float handguards are attached to the receiver only and do not contact any point on the barrel. This reduces the chance of accuracy-reducing pressure on the barrel.

AR-15 Hammer and Trigger Pin Dimensions:
  • Some Colt® AR type rifles have been manufactured with hammer and trigger pins and holes which are approximately .176" in diameter. These are referred to as "large pin" Colts. This was done to eliminate the chances of someone putting M16 fire control parts into an AR receiver. This is not found in all Colt models, just some.
  • All other AR type rifle manufacturers have stayed with the .156" diameter hammer and trigger pins and holes, or "small pin" which is the same spec used in all military M16 rifles.
  • Measure your pins or the holes in your lower receiver to determine if you have a "small" or "large" hole Colt® AR

    Technical Information
    • Upper Receiver Type: A3 Mini SASS Flat-Top
    • Barrel Length: 18"
    • Barrel Contour: Not listed by manufacturer
    • Barrel Material: Stainless Steel
    • Muzzle Thread Pattern: 1/2"-28
    • Chrome Lined: No
    • Barrel Finish: Black Matte
    • Twist Rate: 1 in 8"
    • Chamber: 5.56x45mm NATO
    • M4 Feed Ramps: Yes
    • Muzzle Device: Panther Flash Hider
    • Gas System Length: Rifle
    • Gas Block Diameter: .750"
    • Handguard: Free Float Quad Rail
    • Sights: Front and Rear Flip-Up

    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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