20” Service Rifle barrel with .223 Bison chamber
- Bison Armory Match chamber for both .223 Remington and 5.56 NATO ammunition (5.56 NATO chamber with tighter freebore diameter)
- 416 Stainless steel
- 53 oz including extension
- 4-groove, 1:6.5” twist button rifling
- 5/8-24 muzzle thread
- Rifle length gas system
- M4 feed-ramps
"Rebuild My Upper" info - click HERE
This barrel is made specially to shoot heavy bullets for long range matches, but it's fantastic XTC as well. It will shoot light bullets 52 to 60 grain great for 100 yard practice. Typical match 69 and 77 grain bullets shoot great on the shortline, while the 80.5 Berger, and 80 SMK will clean the 600 yard target if you are up to the task. With the 1:6.5 twist rate, 85.5 Berger, 85 RDF, 90 SMK, and 90 A-Tip will take you all the way to the 1000 yard line!
Optional Shim Set: The best 5$ you will ever spend! These stainless steel shims guarantee you perfect and hassle free barrel nut / gas tube alignment within the correct torque specs every time. For more information on our shims and a step-by-step guide to their use check out our video HERE.
Optional Bolt: We check every bolt / barrel for proper headspace before they leave our shop. For more information on our bolts click HERE.
Optional Bolt Carrier: Carriers ship assembled and include the gas key, firing, retaining and cam pins. If you purchase a bolt and a carrier, we will assemble the complete carrier group for you before shipping. For more information on our carriers click HERE.
More Information: Click HERE to see additional information about all our AR-15 barrels and other components on our “Product Information” page. 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: In stock barrels (together with any additional parts ordered) usually ship within 5 - 10 business days from the date of purchase. Custom coating / bead-blasting and gas block pinning may delay shipping by a few days. 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.