Sentry Gas Block .875 Adjustable Steel Set Screw

Name: Sentry Gas Block .875 Adjustable Steel Set Screw
Brand: SLR Rifleworks
Availability: InStock

SLR Rifleworks · Gas System

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Best price

$134.56at OpticsPlanet

In stock Sale checked Oct 1, 2026

Buy at OpticsPlanet

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Where to buy

Store	Price	Availability	Buy
OpticsPlanet Best price	$134.56Salechecked Oct 1, 2026	In stock	Buy at OpticsPlanet
MidwayUSA	$148.99checked Oct 1, 2026	In stock	Buy at MidwayUSA
Brownells	$132.13checked Oct 1, 2026	Out of stock	Buy at Brownells

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

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Lowest in-stock price in the last 30 days: $134.56 at OpticsPlanet. Dashed line = out of stock. Tracking since Sep 28, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$132.13	$132.13	$132.13
MidwayUSA	$148.99	$148.99	$148.99
OpticsPlanet	$134.56	$134.56	$134.56

Since Sep 28, 2026.

About this part

The Sentry Gas Block .875 Adjustable Steel Set Screw is a gas system part from SLR Rifleworks. It's sold by 3 stores (2 in stock), from $132.13 to $148.99. The lowest in-stock price in the last 30 days was $134.56 at OpticsPlanet.

Fits and works with

Gas block: 0.875" diameter · Gas blocks

Specifications

Manufacturer: SLR Rifleworks
Size: .875
Material: Steel

From the manufacturer

The SLR Rifleworks Sentry Adjustable Set-Screw Gas Block ensures that AR-15 shooters have the ability to fine-tune their gas system for optimum operation. The SLR Rifleworks Sentry Adjustable Set-Screw Gas Block is constructed with a simple metering system that doesn't use springs or balls and is adjustable through the use of an included tool. Machined from 4140 steel Features QPQ Melonite finish Comes in .625, .750, .875 and .936 diameter sizes The SLR Rifleworks Sentry Adjustable Set-Screw Gas Block is equipped with two set screws that lock the block into the barrel for an ideal gas seal. Mfg: Slr Rifleworks