Welcome to Bison Armory

We specialize in AR-15 barrels and custom uppers chambered for the 6.8 SPC cartridge because the 6.8 SPC offers superb accuracy and superior ballistic performance. In our opinion, it is the ideal all-purpose cartridge for AR-15 platform rifles.

Bison Armory is now featuring premium upper assemblies!

Built on Mega or SI Defense billet receivers, our premium upper assemblies cannot be matched. Use our own Bison Armory SPR profile barrels in 18" or 20", or upgrade to match grade Shilen barrels from White Oak Armament. These barrels all feature 4 groove, 1-11" twist rifling with proper SPCII chambers. Pair our premium upper assembly with a matching Mega or SI Defense billet lower receiver, and you will have a rifle with a perfect fit, we guarantee it!

Barrels and Upper Receiver Assemblies

Bison Armory Uppers

Our barrels are made from 416 stainless steel by E.R. Shaw and are some of the most accurate you will find. Our customers report routinely shooting sub-MOA using our barrels and uppers.

We build our custom uppers using components made in the USA by some of the best manufacturers in the business: E.R. Shaw, Yankee Hill Machine, PRI, Young Manufacturing, Tactical Machining, PWS, VLTOR, Troy, Ops Inc, Midwest Industries, AR-15 Performance, and more.

Please browse our webpage for information on our products. Barrels and upper assemblies can be ordered directly from our web store. If you don't see what you need in the store, you can further customize your 6.8 SPC upper by email or phone.