AR-STONER AR-15 A3 Upper Receiver Assembly 450 Bushmaster 16″ Barrel 15″ Ultralight M-LOK Handguard

Original price was: $449.99.Current price is: $324.99.


AR-STONER AR-15 A3 Upper Receiver Assembly 450 Bushmaster For Sale

This AR-STONER AR-15 A3 Upper Receiver Assembly 450 Bushmaster features a 450 Bushmaster bolt carrier group, a Parkerized finish, a low profile gas block, a 16″ barrel, a 15″ Ultralight M-LOK handguard and a heavy profile barrel. But the ar stoner will attach to virtually any average AR-15 lower receiver and comes complete with a charging handle, forward assist, ejection port cover, and bolt and bolt carrier assembly. Supplied without a rear sight, this upper is an excellent platform for a red dot sight or iron sight (both sold separately).

Designed to meet Customer’s needs, the ar stoner barrel provides function, style and affordability for today’s AR-15. The stoner 63 parts kit attaches to virtually any standard AR-15 lower and comes complete with everything you need to start shooting.

Why is it called an Ar stoner barrel?

The word “A3″ comes from the specific size of paper used to sketch out concepts, strategies, and objectives throughout the A3 process (A3 form is also known as 11″ x 17” or B-sized paper). Toyota uses A3 reports for several typical job types: solving issues.

What is an Ar stoner handguard?

The Ar stoner forend offers a flat top configuration with a detachable carry handle. Depending on the manufacturer and model, it may fit the full A3, a Picatinny or Weaver rail to serve as mounting platform scopes and other accessories.

What comes with an ar stoner muzzle brake?

A complete ar stoner muzzle brake may include the total upper plus a charging handle, cask, handguard, and occasionally the bolt carrier group. A packed (or assembled) upper also has installed the ejection port door and the ahead assist button factory.

Why would you use an A3 style upper?

The A3 style upper method identifies problems and proposes solutions summarized on only one side of a sheet of paper. It is a dynamic way of thinking that organizes and synthesizes data clearly and objectively to achieve the established goal.


  • 450 Bushmaster Bolt Carrier Group
  • 15″ Ultralight M-LOK Handguard
  • 16″ 1:24″ Twist Barrel

Made In the United States of America


Product Information

Cartridge 450 Bushmaster
Color Black
Finish Anodized
Material Aluminum
Weight 4.8 Pound
Barrel Length 16 Inches
Twist 1:24 Inches
Threads 5/8″-32
Barrel Contour Heavy
Barrel Finish Parkerized
Chrome Lined No
Gas Block Diameter 0.875 Inches
Gas System Length Carbine
M4 Feed Ramps No
Upper Receiver Type A3 Flat-Top
Barrel Material 4150 Chrome Moly Vanadium Steel
Handguard 15″ Ultralight M-LOK
Bolt Carrier Assembly Included Yes
Muzzle Device Flash Hider
Country of Origin United States of America
Compatible With

Delivery Information

Shipping Weight 5.880 Pounds



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