Reviews & Ratings for SLR Sentry 6 .625 Adjustable Gas Block w/.400 in. Set Screw Spacing — 2 reviews — Page 1

This is a great adjustable gas block! I have one like this one and also a similar SLR titanium adjustable gas block.

Be aware that adjustable gas block must have routine maintenance so they do not carbon lock up and stop working.

I routinely turn the adjustment screw in and out while spraying Kroil penetrating oil on the adjustment screw and into the gas block.

I also apply a silver anti-seize lubricant to the adjustment screw to be able to easily turn the screw.

I had one of these in size .750 on my 300 Blackout pistol. Shot it for maybe 200 rounds with a lightweight bolt carrier in the gun. Decided to try a full-weight BCG, so opened the gas port up as necessary for the heavier BCG. Shot maybe 60-80 rounds, then put the LW BCG back in. I could not turn the gas screw back in. So I contacted SLR rifle works. They were nice enough to immediately ship me a replacement. Now I have put 100-120 rounds thru it, while being very careful to turn the gas off after each range session to remove any carbon build up. Today I shot 40 rounds and then thought it was a little over-gassed, so I tried to turn the gas down by one click. It would not move. It will allow more gas, but has lost ability to turn gas down anymore. I removed the screw, and it was covered with the copper/brass color of the bullets I was using. Was kinda splotchy metal galled onto the screw. Tried some gun cleaner with some 400 grit sand paper. Cleaned the screw up, but it must be stuffed up on the inside bore. Still won't adjust below setting 6 where it was for the last 40 rounds. It would be fine if I never planned to adjust it again, but I plan on putting a suppressor on this gun, and will need to adjust when I use it. I'm shipping back this 3rd one in never used condition. Just can't trust it to work. A real shame because it is light and appears very well made.