Great option for those wanting a lighter recoiling lightweight ar - SLR Sentry 6 .625 Clamp On Adjustable Gas Block

I have been pursuing the "perfect" lightweight AR build. Lightweight builds often come with a drawback of heavier recoil, but adjusting the gas can reduce this tendency. All of the lightest weight (pencil) barrels use the 0.625" gas block journal. Sentry is one of the few companies that make a well-designed, clamp-on, adjustable gas block with the 0.625 internal diameter. It works great. I was so pleased with the first one, I bought a second for another build. It is a beautiful piece of machining and works well for its purpose.

The only reason I gave it a four out of five is that there isn't fine enough gas adjustment. It seems like the "sweet spot" for a well tuned rifle is right in between two of the detents. So, I have either a little too much or too little gas.

The only other nit-picking thing is the adjustment method. You need a REALLY long 5/16 hex-key to adjust it with any normal length of handguard. (I recommend the 9" Eklind Tool 61905 5/64 Inch T-Handle Hex/Allenn wrench.)

Buy with confidence!