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Reviews & Ratings for SLR Sentry 7 .750 Adjustable Gas Block w/.400 in. Set Screw Spacing — 8 reviews

(8 reviews)
SLR Sentry 7 .750 Adjustable Gas Block w/.400 in. Set Screw Spacing
SLR Sentry 7 .750 Adjustable Gas Block w/.400 in. Set Screw Spacing
As Low As $141.64 Save Up to $11.18
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Most Helpful Positive Review Sentry .750 adjustable gas block
The Sentry.750 adjustable gas block works as it should, very happy with it. The only complaint I have is ordering through Optics Planet. Had ordered a few parts from this company and it took up to 13 days to receive them.
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Ease of use

by Idaho, Verified Owner from ID, United States Written on September 3, 2025
SLR is the only adjustable Gas block I use. I have them on several of my suppressed builds. The click adjustment is Great.
Best Used for:
  • Suppressed Applications
Would recommend: Yes
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Best on the market

by Poot, from TX, United States Written on January 6, 2024
I have several of these gas blocks on various builds and they’re great for tuning your suppressed builds and AR10 builds. Very well machined…has a very positive click when adjusting your gas setting. These are the best on the market in my opinion.
Would recommend: Yes
Was it helpful to you? Yes | No
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Best adjustable gas block out there

by AIBB, Verified Owner from LA, United States Written on December 15, 2023
For my ultimate AR15 build I chose the SLR GB7 to go on a Core 18” barrel in 6.5 Grendel. Makes sense to put the best on the best. Love the SLR gas blocks. Solid. Great price and super shipping from OP. The best of the best too.
Would recommend: Yes
Was it helpful to you? Yes | No
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Slr 7 adjustable gas block.

by Caleb, from MO, United States Written on April 13, 2022
Works as it should. It was very Easy to install. The Instructions are easy to understand. I really like that you have audible clicks when backing adjustment screw in or out.I believe this is one of the best gas blocks money can buy!
Would recommend: Yes
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Great gas block

by Lake, from WA, United States Written on July 17, 2021
Slr rifleworks makes in my opinion the best gas block around. Fit, finish, and function are flawless. Have two of these and plan to put them on my other two Ar-15s as well. Highly recommend these for any build that you are trying to fine tune cycling and recoil.
Would recommend: Yes
Was it helpful to you? Yes | No
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SLR Sentry Adjustable Gas Block

by Steven, from MD, United States Written on February 27, 2021
This gas block works exactly as described. It was installed on a AR10 in .308. Fit and finish were perfect and Optics Planet was quick to ship. I have changed out 3 of my other non adjustable gas block with the same product.
Would recommend: Yes
Was it helpful to you? Yes | No
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High Quality, Light weight Adjustable gas block

by joejoe, Verified Owner from AL, United States Written on June 22, 2018
Did some substantial research before deciding on this SLR gas block
It is considered one of the best if not the best adjustable gas block
I will have to report back after using it more rounds. Others reported using it for thousands of rounds without any seizing
Would recommend: Yes
1 of 3 found the following review helpful.
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