12 to 14 Weeks
Our ARs are tested with mil spec buffer tubes and springs. Any changes could change the way your AR functions.
Order a custom AR-15 barrel with barrel extension. Please check our Frequently Asked Questions for our current lead times.
Gas Block Selection
- max length with .625 Gas Block - 16"
- max length with .750 Gas Block - 22"
- max length with .875 Gas Block - 28"
- max length with .936 Gas Block - 28"
Gas Block Length
All X-Caliber AR barrels are made to a 1.92" gas block lenght EXCEPT our Lightweight contour which has a 1.00" length.
Add up to 6 weeks for Nitride to your order.
We use Mill Spec parts for testing. If any Non Mil Spec (Adjustable Gas Block, Heavy Buffer, Reinforced Springs, Light/Heavy BCGS, Piston Systems) parts are used, X-Caliber must be contacted. If not your firearm may not cycle properly.
No shipping ouside the US