SLR Rifleworks Sentry 8 Set Screw Adjustable Gas Block

Sentry .750" Set Screw Version - Melonite QPQ Finish

.400" Set Screw Spacing

1.3 oz

US PATENT NO. 9,410,756

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 f