Quick Tip: How To Align a Gas Block on an AR-15 Barrel
This guide, presented by Caleb from Brownells, details the correct procedure for installing a set-screw type gas block on an AR-15 barrel, specifically when the barrel is dimpled. The key takeaway is to always tighten the rear set screw first, ensuring it engages the barrel's dimple for precise alignment. This method guarantees the gas port in the block will perfectly align with the barrel's gas port, a critical step for proper firearm function.













