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SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing Up to $11.55 Off w/ Free S&H — 2 models

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SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black 00810646034754
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Titanium 00810646034761
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black 00810646034754
1 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black 00810646034754
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Titanium 00810646034761
2 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Titanium 00810646034761
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
3 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
4 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
5 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
6 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
7 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
8 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM
9 of 9 images
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM

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Questions & Answers
One of the answers says the gas block requires an ID 1.35". Wilson Combat spec states 1.53" needed for ID, yet I have a 1.57" guard. Which is correct? Expert Answer

The SLR Sentry 8 .875 Adjustable Gas Block needs a 1.35" minimum internal diameter handguard. So your 1.57" ID handguard will have no issues fitting this gas block within it.

by Ethan, Gear Expert, February 28, 2022
See 1 More Answer
What is the length of the gas block? Expert Answer

The manufacturer doesn't state the length of the SLR Sentry 8 .875 Adjustable Gas Block. I would contact them to confirm the length.

by Hunter, Gear Expert, January 27, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review SLR Sentry 6.5 CM build by Judge1, Verified Owner, December 30, 2020
Received this quickly from Optics Planet after ordering. The quality is excellent, the Wilson combat gas tube I ordered fit perfectly, roll pin hole lined up with gas tube slot and set screw dimensions matched my barrel dimples exactly.
2/2 found this helpful
Helpful Positive Review Rare Gas Block for applications under a Slim Handguard by theFLASH, Verified Owner, October 18, 2018
Using this on a BSF Barrel (.875") and under a V-Seven Ultra-Light Handguard. There are no other manufacturers that make such a light Low profile Titanium Gas Block in .875" that's adjustable, so thank you SLR Sentry for having this available in a...
Read More...
7/7 found this helpful
Helpful Positive Review Slr sentry 8 gas block by Slick, February 2, 2019
This is my second slr sentry adjustable gas block, I have one in ti and one in black and in my opinion the best adjustable gas block on the market. it really lets you fine tune the gas system with ease with the detends in the adjustment screw and ple...
Read More...
1/1 found this helpful
Most Recent Reviews Smaller than advertised...Not .875 by bnhcomputing, July 3, 2021
I ordered this in the hopes it would be lower profile than the odin works I had originally ordered because the odin works ISN'T low profile. Well, this IS definitely low profile but does NOT FIT my new Criterion .875 barrel. The description says it...
Read More...
0/2 found this helpful
Most Recent Reviews SLR sentry Gas Block by Judge1, Verified Owner, January 4, 2021
Fast shipping from Optics Planet. I purchased this adjustable gas block for a Wilson combat barrel. Fit and finish were good. I am purchasing another SLR Sentry but a size larger for a new Christensen arms 6.5 creedmoor barrel.
Most Recent Reviews Must have for AR-10 by FLIR-DEE-LEE, March 30, 2020
If you have an AR-10 platform you will need one of these or you will not be able to use a can. I built .308 and 6.5 creedmoor and both are over gased and do not feed properly with standard gas blocks. Especially if you use a suppressor. This is the...
Read More...
Read All 6 Reviews
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Product Info for SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing

Features/Specifications:image

.400 inch Set Screw Spacing.

15-position adjustability from 0 - 0.125 inch 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 metering.

Melonite finish 4140 Nexturn Swiss precision metering screw.

Proprietary Alloy Flat Spring with 1400deg temper.

Melonite finish 4140 detent plunger.

USES STANDARD GAS TUBE.

Included Accessories:

Tool, roll pin and mounting screws

Specifications for SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing:

Manufacturer: SLR
Coating: Melonite QPQ Finish
Gas Block Journal Size-Diameter: .875 in
Gun Make: AR Platform
Additional Features: w/.400 in. Set Screw Spacing
Condition: New
Gas System Type: Direct Impingement

Features of SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing:

  • .400 inch Set Screw Spacing.
  • 15-position adjustability from 0 - 0.125 inch 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 metering.
  • Melonite finish 4140 Nexturn Swiss precision metering screw.
  • Proprietary Alloy Flat Spring with 1400deg temper.
  • Melonite finish 4140 detent plunger.
  • USES STANDARD GAS TUBE.
  • Included Accessories:
  • Tool
  • roll pin and mounting screws

Package Contents:

  • SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing

SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing Orderable Models

List of Orderable Models

SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Black, SA8-SM , MPN: SA8-SM , Code: 39E-RGB-SLRSEN8W400-SA8-SM
SLR Sentry 8 .875 Adjustable Gas Block w/.400 in. Set Screw Spacing, Titanium, SA8-TI-S , MPN: SA8-TI-S , Code: 39E-RGB-SLRSEN8W400-SA8-TI-S
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