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Questions & Answers
Will this work on a Faxon 556 pencil barrel? Expert Answer

Yes, the MPN:GB-1S specifically should fit that barrel.

by Kurt Colbourne, Gear Expert, October 21, 2021
I have a 16 inch barrel thats .750 inch diameter and pre-dimpled at .450 inch spacing. will this spacing work with the Viltor gas block. Expert Answer

Unfortunately Vltor has not provided the set screw spacing, even on their own site. We recommend contacting them directly, they should be able to provide you with that information. You can reach them here: https://www.vltor.com/contact-us/

by Ethan C., Gear Expert, November 14, 2019
Customer Reviews
Helpful Negative Review
Screw Type Gas Block by Robert Berryman, Verified Owner, February 10, 2020
Looks well made but the photo shows this .625 as a clamp type with screws and I received a set screw version which had a slightly different sku number on the packaging. What a bummer I bought it because I needed the clamp type, returning for store cr...
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1/5 found this helpful
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Condition:
New

Code: 24Y-RGB-GBS-GB2S

MPN: GB-2S

UPC: 1260435

List: $74.95Save 10%
$67.46

Product Info for Vltor Low Profile Gas Block, Screw Mount

Vltor GB1S Gas Block Screw Mount Low Profile .625" Stainless Steel Black - Built to the tightest tolerances, the VLTOR low profile, set screw gas blocks are small enough to fit inside most rail systems. These gas blocks were designed to be used when a rail system/handguard that is mounted over the entire gas system. They are made from 17-4 PH stainless streel and and have a matte black oxide finish. The bore diameter is 0.625" (pencil barrel).image

Specifications for Vltor GB1S Gas Block Screw Mount Low Profile .625" Stainless Steel Black:

Mfg Item Num:  GB1S
Supplier SKU:  99498
Category:  FIREARM PARTS
Type:  Gas Block
Model:  GB-1S
Finish:  Black
Size:  .625"
Material:  Stainless Steel

Vltor Low Profile Gas Block, Screw Mount Orderable Models

List of Orderable Models

  • Vltor GB2S Gas Block Screw Mount Low Profile .75 Stainless Steel Black , MPN: GB-2S , UPC: 1260435 , Code: 24Y-RGB-GBS-GB2S

Vltor Low Profile Gas Block, Screw Mount Unavailable & Discontinued Models

List of Unorderable Models

  • USED Vltor GB1S Gas Block Screw Mount Low Profile .625 Stainless Steel Black, EDEMO1, Used, Condition Fair, Condition Fair, Used , MPN: GB-1S-EDEMO1 , Code: 24Y-RGB-GBS-GB1S-EDEMO-US-D
  • Vltor GB1S Gas Block Screw Mount Low Profile .625 Stainless Steel Black , MPN: GB-1S , Code: 24Y-RGB-GBS-GB1S
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