12 to 14 Weeks
We only guarantee 1 MOA or less if the bolt is headspaced to the barrel by X-Caliber Barrel & Mfg.
Our ARs are tested with mil spec buffer tubes and springs. Any changes could change the way your AR functions.
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