Shouldering an AR Pistol with a SIG Brace

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Steve Aryan of Grey Fox Industries discusses considerations when shouldering an AR pistol using the SIG Stabilizing Brace or a pistol buffer tube.

SIG Brace

The SIG Brace is not a stock, so it is not permanently physically attached to prevent it from shifting or spinning. Steve twists it so it’s cockeyed. This is not helpful in gaining speed and consistency in the mounting process. Make sure the SIG Brace stays squared away!

Where do you mount it? Many people mount it in a position that their natural point of aim is off, which you don’t want to do. Mount it just a hair off of centerline, so instead of the recoil pushing you to the side, it will push you straight rearward and allow faster follow-up shots.


Steve works just on shouldering the AR pistol and driving it up. Mount it inward on the body and focus on the bottom of the SIG Brace, just like you would a stock, and pivot it as if it’s on a ball joint, minimizing the movement. Drive the AR pistol up to your cheek. Don’t bring your face down to it.

High-Capacity Magazine Issue

As you drop the pistol down into a low ready position, if you have a magazine inserted, especially a high-capacity magazine, it will hit you in the lower stomach area. As a result, shooters often pivot the pistol so it’s more comfortable. Steve stresses that if you do that, keep the point of contact between the SIG Brace and your upper chest so you can quickly drive the pistol up and continue to get the consistent, fast cheek weld that is needed to put shots on target efficiently.

If you’re not running a SIG Brace but a pistol buffer tube, the same principles for shouldering an AR pistol roughly apply, as Steve demonstrates.

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