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Questions & Answers
Is this tall enough to hold the handguard cap? Expert Answer

Recommend emailing us at techsales@opticsplanet.com to help you out further.

by Ryan Tarczynski, Gear Expert, June 21, 2021
Customer Reviews
Helpful Positive Review Adjustable gas’s block by JJ, August 18, 2020
Quality made and reasonable price for the option of adjustability. It went on a 300 blackout pistol running mostly supersonic and a few subsonic for home defense. I would definitely recommend using this product
2/2 found this helpful
Helpful Positive Review High quality adjustable gas block by Rob, March 25, 2019
This block is a bit pricey but definitely shows the quality in the craftsmanship. Really nice machining and tight tolerances. Using this on a LaRue stealth barrel which are very accurate 1/2 moa barrels but they run notoriously over-gassed so being a...
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5/5 found this helpful
Helpful Positive Review very nice adjustable gas block by hyper33, Verified Owner, September 10, 2020
Very nice adjustable gas block. Good option for AR pistol if you don't want to mess around with different buffer weights to make your pistol cycle properly. Very easy to adjust with an extended driver which is also very cheap to purchase.
2/2 found this helpful
Helpful Positive Review SLR Sentry 7 by ConBroChill, July 14, 2018
I purchased the titanium gas block for my Larue Stealth barrel, since the set screw spacing is a little wider than most barrels on the market. My Stealth barrel’s gas port measured .83” for a 14.5” barrel, which would make that particular barrel over...
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1/6 found this helpful
Helpful Negative Review GTG GAS BLOCK by TX2A, Verified Owner, January 27, 2021
Alright, so the gas block is premium. The fit and finish is second to none. I was unsure what to expect, but it really is a manufacturing work of art. The tolerance was tight, it practically stays on the barrel without set screws. I am really imp...
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2/8 found this helpful
Most Recent Reviews Got my AR10 cycling perfect by BigCasino, Verified Owner, February 10, 2025
I had an aero adjustable block on my AR10 sniper build & t just wasn’t cycling correctly after testing everything finally broke down & replaced it with the sentry. Cycling like a dream now.
Read All 17 Reviews
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Product Info for SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing

Ensure your firearm is properly cycling and delivering peak performance by installing this SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing. Regardless of the option you choose, each AR Gas Blocks by SLR contains a Melonite QPQ finish that greatly increases the corrosion resistance to provide more reliable service and a longer lifespan. This SLR Sentry 7 .750 Adjustable Rifle Gas Block offers 15 positions of adjustability to fit your exact firearm and shooting style the best, and these blocks come with everything you need to install them on your firearm. Enhance your weapon with the SLR Sentry 7 Set Screw Adjustable Gas Block for top-shelf performance with every pull of the trigger.image

Specifications for SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing:

Manufacturer: SLR
Coating: Melonite QPQ Finish
Size: 0.75
Caliber: .750 Nitro Express
Gun Make: AR Platform
Additional Features: w/.450 in. Set Screw Spacing
Condition: New
Gas System Type: Direct Impingement

Features of SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing:

  • 15-position adjustability from 0 - 0.125in 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 Precision machined gas block
  • Melonite finish 4140 Nexturn Swiss precision metering screw
  • Proprietary Alloy Flat Spring with 1400deg temper
  • Melonite finish 4140 detent plunger
  • USES STANDARD GAS TUBE
  • Tool, roll pin and mounting screws included

Package Contents:

  • SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing
  • Tool
  • Roll pin
  • Mounting screws

SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing Orderable Models

List of Orderable Models

SLR Sentry 7 .750 Adjustable Gas Block w/.450 in. Set Screw Spacing, Black, SA7-450-SM , MPN: SA7-450-SM , UPC: 0810646034709 , Code: 39E-RGB-SLRSEN7W450-SA7-450-SM
SLR Sentry 7 .750 Adjustable Gas Block w/.450 in. Set Screw Spacing, Titanium, SA7-TI-S-450 , MPN: SA7-TI-S-450 , Code: 39E-RGB-SLRSEN7W450-SA7-TI-S-450

SLR Sentry 7 .750 Adjustable Gas Block w/ .450 in. Set Screw Spacing Unavailable & Discontinued Models

List of Unorderable Models

USED SLR Sentry 7 .750 Adjustable Gas Block w/.450 in. Set Screw Spacing, Black, SA7-450-SM, EDEMO1, Condition Fair, Used , MPN: SA7-450-SM-EDEMO1 , Code: 39E-RGB-SLRSEN7W450-SA7-450-SM-EDEMO-US-D
USED SLR Sentry 7 .750 Adjustable Gas Block w/.450 in. Set Screw Spacing, Black, SA7-450-SM, EDEMO2, Used, Condition Fair , MPN: SA7-450-SM-EDEMO2 , Code: 39E-RGB-SLRSEN7W450-SA7-450-SM-EDEMO2
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