Bison Armory 20" National Match Service Rifle Upper Assembly
Our match service rifle upper assembly provides the optimal combination of price and performance. Combine this upper assembly with our service rifle lower assembly for a complete rifle that will give you the confidence you need to shoot at your best.
Base Components: The base upper includes the following components, all of which we will assemble for you before shipping: A2 upper receiver with integral carry handle with double pinned match rear sight, or A4 flat-top upper with optional detachable carry handle with double pinned match rear sight. Port door and forward assist are included. Bare stainless barrel with A2 front sight base, gas tube, free float tube and A2 plastic handguards, and Stag bolt. Young Manufacturing black phosphate carrier is standard, with chrome and match carriers available as options.
This upper assembly comes standard with a Stag bolt or optional JP enhanced bolt. If you select a different bolt from the “Bolt Options”, your build will be upgraded accordingly. We check every bolt / barrel for proper headspace before they leave our shop. For more information on the bolts we stock, click HERE
Bolt Carrier Options:
If you choose to purchase a bolt carrier along with your upper, it will be assembled for you and include the gas key and firing, retaining and cam pins. For more information on the bolt carriers we stock, click HERE
Our match service rifle upper is hand crafted starting with a White Oak Match Service Rifle barrel made from a 416 stainless Shilen 4-groove Ratchet Rifled blank. These barrels feature 1:8” twist rifling, a 1/2-28 threaded muzzle or unthreaded, either with a proper target crown. Each barrel is hand fitted to the upper receiver during assembly to ensure smooth cycling. Barrel finish is available in bare stainless or black Cerakote. For more information on Bison Armory AR-15 barrels, click HERE
Barrel Extension: We only use White Oak Competition barrel extensions by BAT Machine with our National Match Service Rifle barrels. These extensions are a revolution in engineering and add additional rigidity and strength where your barrel needs it most.
Forearm Info: Our National Match Service Rifle Upper is made with a White Oak free float tube for maximum accuracy.
Additional information about most of the components we use in our builds is available through our “Product Information” page HERE
If you are unfamiliar with AR-15 barrel maintenance and new barrel break-in, we encourage you to view our "Maintenance" page HERE
for some tips on getting the most out of your firearm.
Shipping: National Match Upper Assemblies based on White Oak service rifle barrels made from Shilen blanks usually ship 20-35 business days from the date of purchase. We ship via UPS to addresses within the contiguous United States, and USPS Priority to Alaska and Hawaii.
Billing: Your credit card is charged for the full amount of your purchase at the time you place your order, not when your order ships.