SLR Rifleworks

Slr Rifleworks Sentry Gas Block .875 Adjustable Steel Set Screw

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Slr Rifleworks Sentry Gas Block .875 Adjustable Steel Set Screw - Gas Block for AR-15 - view 1
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SLR Rifleworks

Overview

The SLR Rifleworks Sentry Gas Block is designed for builders who need an adjustable gas block with a diameter of .875 inches, allowing for fine-tuning of gas flow to match specific ammunition and shooting conditions. Constructed from steel and finished with nitride, this set screw mount gas block provides durability and reliability under various operating conditions. This component is frequently used in builds featuring a carbine gas system, particularly with the .458 SOCOM caliber, making it a solid choice for those looking to optimize their performance.

Specifications

MPNSA8-SM
FinishNitride
Mounting TypeSet Screw
MaterialSteel
AdjustableYes
Gas Block Diameter.875

Available Merchants(2)

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$134.56
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$132.13
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Build history on GunPartPicker

Builders on GunPartPicker first added the Slr Rifleworks Sentry Gas Block .875 Adjustable Steel Set Screw to a build in February 2026.

It was in stock most days in September 2026, and today only Optics Planet has it in stock. Prices barely moved in September 2026, holding around $132.13, so there haven't been real sales lately. Buying today, the lowest price is $134.56 at Optics Planet.

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Frequently Built With

The part most often added in each category by the builds that include this one

Radian Weapons AR-15 Raptor Ambidextrous Charging Handle FDE

Radian Weapons AR-15 Raptor Ambidextrous Charging Handle FDE

Charging Handle$100in 50% of them
FAXON Firearms 16" .458 Socom Carbine Length Gunner Big Bore AR-15 Barrel

FAXON Firearms 16" .458 Socom Carbine Length Gunner Big Bore AR-15 Barrel

Barrel$201in 50% of them
Aero Precision 12" AR-15 Atlas R-One M-LOK Handguards, FDE

Aero Precision 12" AR-15 Atlas R-One M-LOK Handguards, FDE

Handguard$183 · out of stockin 50% of them
FAXON Firearms .458 Socom AR-15 Bolt Carrier Group - Nitride

FAXON Firearms .458 Socom AR-15 Bolt Carrier Group - Nitride

Bolt Carrier Group$161in 50% of them
BLEM PSA AR15 Complete Classic Stealth Lower, Black

BLEM PSA AR15 Complete Classic Stealth Lower, Black

Lower Receiverin 50% of them
CMMG AR-15 Gas Tube Stainless Steel Carbine

CMMG AR-15 Gas Tube Stainless Steel Carbine

Gas Tube$14in 50% of them

Builds Featuring This Part

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Builds in the community that include the Slr Rifleworks Sentry Gas Block .875 Adjustable Steel Set Screw

BuildPartsTotal
16" PSA recce build
16" PSA recce		11$951.46

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