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Questions & Answers
After adjusting the gas block do you have to use loctite and back the screw all the way out and back in? Or do you just adjust and leave it as is ? Expert Answer

No, once the adjustment screw is in position you are good to leave it as it is.

by Kurt Colbourne, Gear Expert, March 3, 2021
I purchased mine months ago but the gas tube is 2 inches shorter then what I need. Where can I get the gas tube for it? I have a 20 inch Barrel. Expert Answer

Please contact us at techsales@opticsplanet.com

by Kurt Colbourne, Gear Expert, March 3, 2021
Customer Reviews
Most Recent Reviews Needed some tuning on an MK18. by FTC, Verified Owner, January 28, 2024
Very simple to adjust and made tuning my mk18 from suppressed to unsuppressed an ease. I've used many different ajb's on every configuration imaginale and SA turned into my "goto." On Pistol/SBR's I've always felt hesitant on using anything else bu...
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Product Info for SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing

Features/Specifications:image

.450 inch Set Screw Spacing.

Note- If you have a barrel with no dimple or one dimple under the gas port either our .400 or .450 set screw spacing blocks will work fine. There is no difference in the blocks just the front set screw location.

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.

Works with ALL AR15/AR10 Handguards.

Included Accessories:

Tool, roll pin and mounting screws

Specifications for SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing:

Manufacturer: SLR
Coating: Melonite QPQ Finish
Gas Block Journal Size-Diameter: .625 in
Gun Make: AR Platform
Additional Features: w/.450 in. Set Screw Spacing
Condition: New
Gas System Type: Direct Impingement

Features of SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing:

  • .450 inch Set Screw Spacing.
  • Note- If you have a barrel with no dimple or one dimple under the gas port either our .400 or .450 set screw spacing blocks will work fine
  • There is no difference in the blocks just the front set screw location.
  • 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.
  • Works with ALL AR15/AR10 Handguards.
  • Included Accessories:
  • Tool
  • roll pin and mounting screws

Package Contents:

  • SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing

SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing Orderable Models

List of Orderable Models

SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing, Black, SA6-450-SM , MPN: SA6-450-SM , Code: 39E-RGB-SLRSEN6W450-SA6-450-SM
SLR Sentry 6 .625 Adjustable Gas Block w/.450 in. Set Screw Spacing, Titanium, SA6-TI-S-450 , MPN: SA6-TI-S-450 , Code: 39E-RGB-SLRSEN6W450-SA6-TI-S-450
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