SLR Rifleworks: Sentry 7 Set Screw Adjustable Gas Block

Sentry.750" Set Screw Version - Melonite QPQ Finish.400" Set Screw Spacing. 1.3 oz. Note- If you have a barrel with no dimple or one dimple under the gas port either our.400 or.450 set screw spacing blocks will work fine. There is no difference in the blocks just the front set screw location. Features: 15-position adjustability from 0 - 0.125" port opening. Metering screw and screw bore design allows repeatability and reliability only SLR has been able to deliver. Single tool click to adjust gas