Great design - Superlative Arms Titanium Adjustable Bleed Off Gas Block

The SA gas block design gives the ability for gas adjustment by restriction OR bleed off. I have found and they recommend that the bleed off mode be used as it will not foul the set screw and seize it up. Other adj gas blocks only offer a restriction adjustment and if you just leave it set there for too long it will be stuck in that position due to fouling. The SA block is very fine in the adjustment allowing to dial in perfect brass ejection which is crucial to have when running a lightweight BCG.