This video provides a quick tip from Brownells Gun Tech™ Caleb Savant regarding the proper alignment of AR-15 gas blocks, specifically addressing the common misconception about needing a gap between the gas block and the barrel's shoulder. Caleb clarifies that for 5.56 NATO / .223 Remington AR-15s, the gas hole in the block is larger than the barrel port, meaning a gap is not necessary for proper gas flow. He demonstrates using a borescope that pushing the gas block flush against the shoulder does not obstruct gas flow. The advice is to align the block with a dimple if present, or push it tight against the shoulder if using a clamp-on block or if the barrel is not dimpled. This rule is specifically for 5.56 / .223 caliber AR-15s.
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