Bushmaster AR-15 A3 Flat-Top Upper Assembly 450 Bushmaster 1 in 24" Twist 16" Barrel Chrome Moly Matte with Free Float Handguard,"Izzy" Muzzle Brake, 5-Round Magazine Pre-Ban

Product #: 897816 Bushmaster #: 91700 / F1007561 UPC #: 604206093271

Product Information

This drop-in A3 upper will attach to virtually any standard AR-15 lower receiver. Comes complete with a charging handle, forward assist, ejection port cover, bolt and bolt carrier assembly. Also features a versatile flat top for mounting optical devices or accessories. Includes a 5 round magazine.

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
    • Was this information helpful? Yes No

    This Information was not helpful because:

    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.
    Navigation
    Recently Added
    Suggested Products