AR Barrels

X-Caliber Barrel & Mfg. offers the widest variety of contours and calibers in the industry. Our quality is equal to, or surpasses any of the big name barrel makers. All of our barrels are hand lapped and QC inspected before they are shipped to ensure the highest quality and greatest accuracy. 

Note - Our 1 MOA Accuracy Guarantee is ONLY valid with JP Ent, Young Mfg, and RCA bolts head spaced to your barrel at our factory. You can buy one from us, or you can send us yours and we will head space it here for a $10 fee.



View as Grid List
Sort by

Configure Your Custom AR-15 Barrel

Build a custom AR-15 barrel

Configure Your Custom AR22 Barrel

Build a custom AR22 conversion barrel. For use with AR15 to .22LR conversion kits only (.22LR to 223Rem Chamber Insert type). These barrels come with .217/.222 or .218/.222 bore and groove rifling but with a .223Rem chamber to accept various conversion kits out there but without sacrificing accuracy/velocity from using improper bore/groove diameter. No gas ports are drilled on these barrels. -----MUST BE USED WITH AN AR-15 to 22LR CONVERSION KIT AND FIRED ONLY WITH .22LR AMMO-----PLEASE READ BELOW IN OVERVIEW FOR MORE DETAILED INFORMATION.

Custom AR15 Barrel for Superlative Arms Piston Kit

Build a custom AR-15 barrel specifically for use with a Superlative Arms Piston Kit. This barrel will come with properly sized and spaced gas block journal dimples along the bottom for use with Superlative Arms' Piston Retrofit Kits. The gas port will sized appropriately as well.

Configure Your Custom LR308/DPMS Barrel

Configure your LR308/DPMS barrel

AR 9mm Barrel

1:10 Twist, 6 Groove, 1/2"x28 or 5/8"x24 Muzzle Thread

45 ACP Barrel

1:16 Twist, 5/8"x24 or 11/16"x24 Muzzle Thread