Gunsmith Tools & SuppliesBlack Rifle Disease EngineerinSold by Brownells

Black Rifle Disease Engineerin

Ar-15/M16 Gas Block Pinning Jig - Gas Block Pinning Jig

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Heavy Steel

Fixture for permanent attachment of

Holds Aligns

Vltor or BCM gas blocks

Supports Straight

Taper pin hole drilling for

Can Be

Modified to fit other low-profile

Instructions Included

For setup and use

$104.99
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SKU: 100006129

Overview

This fixture is designed for securing a low-profile gas block during permanent installation work, helping guide a straight drilling setup for pinning. It is intended for use with Vltor or BCM gas blocks, and the included instructions support the setup process. The fixture can also be modified with a file or rotary tool to accommodate other low-profile gas blocks, including Yankee Hill and Stag Arms. Built from heavy steel with a black oxide coating, it is a specialized shop tool for builders who want a controlled, repeatable pinning setup.

Why Hunters Choose the Black Rifle Disease Engineerin

Securely Holds

Aligns low-profile Vltor or BCM

Supports Precise

Drilling for straight or taper

Permanent Installation

Of low-profile gas blocks

Can Be

Modified to fit other low-profile

Includes Instructions

For setup and use

Key Features

  • Heavy steel fixture for permanent attachment of low-profile gas blocks
  • Holds and aligns Vltor or BCM gas blocks for precise drilling
  • Supports straight or taper pin hole drilling for permanent installation
  • Can be modified to fit other low-profile gas blocks
  • Instructions included for setup and use
  • Made from 836 plate steel with black oxide coating

Best Used For

  • Armorer or gunsmith installing a permanent low-profile gas block on compatible AR-15/M16 builds
  • Experienced builder needing a fixture for precise drilling during gas block pinning work
  • Users working with Vltor or BCM low-profile gas blocks for straight or taper pin holes
  • Shop or bench setup where included instructions and secure alignment matter for repeatable installation
  • Builders willing to modify the fixture for other low-profile gas blocks such as Yankee Hill or Stag Arms

Specifications

Blade Finishblack oxide coating
Compatible Gas Blockslow-profile Vltor or BCM gas block
Height2 3/8 in (5.99 cm)
Instructions IncludedYes
Length1 in (2.54 cm)
Material836 plate steel
Weight17.3 oz. (490 g)
Width2 in (5.08 cm)

Pros

  • Securely holds and aligns low-profile Vltor or BCM gas blocks for drilling
  • Supports precise drilling for straight or taper pin holes
  • Designed for permanent installation of low-profile gas blocks
  • Can be modified to fit other low-profile gas blocks
  • Includes instructions for setup and use
  • Heavy steel fixture with black oxide coating

Considerations & Trade-offs

  • Designed for low-profile Vltor or BCM gas blocks, so fit may require modification for other compatible-style blocks.
  • Use is centered on drilling a permanent pin hole, which makes it a specialized tool rather than a general-purpose armorer’s fixture.
  • Its steel construction and 17.3 oz. weight add durability, but also make it less compact than lightweight shop accessories.
  • Instructions are included, but the setup still calls for careful alignment and drilling to achieve the intended result.

Suggested Comparisons

  • AR-15/M16 gas block installation tools
  • Firearm drilling fixtures and jigs
  • Low-profile gas block mounting accessories
  • Armorer's bench tools

Suggested Accessories

  • Drill bits
  • Pin punches
  • Bench vise
  • Layout marking tools

Frequently Asked Questions

What is this jig used for?

It is a drilling fixture for permanent attachment of low-profile gas blocks. The fixture holds and aligns the gas block to help drill a straight or taper pin hole for installation.

Which gas blocks does it fit as described?

It is described for low-profile Vltor or BCM gas blocks. The description also says it can be modified with a file or rotary tool to fit other low-profile gas blocks, such as Yankee Hill and Stag Arms.

Does it include instructions?

Yes. The product description states that instructions are included.

What material and finish are listed for the fixture?

The listed specifications are 836 plate steel with a black oxide coating.

What are the listed dimensions and weight?

The listed dimensions are 1 inch long, 2 inches wide, and 2 3/8 inches tall. The listed weight is 17.3 oz. (490 g).