Low Profile Gas Blocks

Low profile gas blocks are extremely simple devices. They are intentionally minimized for weight and to fit under a free float forearm. We have sold a ton of our standard low profile gas blocks and have never had a single problem with them. They are attached via two set screws and can be pinned to the barrel as an option.

 

 Basic low profile gas block

Pins, Clamping, and Set Screws

A gas block can be secured to the barrel using one or more pins, clamps, and/or set screws. We use low profile gas blocks with set screws. The first set screw is positively located on the barrel via a dimple that is opposite the gas port.

Pinning a gas block to the barrel involves drilling and reaming precise holes in the barrel and gas block for a press-fit dowel pin. The dowel pin fit is very tight, such that it will never come loose on its own. Many military and police field weapons use pins where possible.

Bison Armory generally DOES NOT recommend pinning the gas block for weapons used primarily for hunting, target shooting, and competition. Pinning is desirable for duty weapons or rifles that will be used in high-intensity situations like those offered in some classes.

IMPORTANT: Gas block pinning is a non-refundable procedure! If you choose a low profile gas block as part of your order, Bison Armory can pin the gas block to the barrel using a single straight pin at an additional cost of $40.

 

Barrel on top shows a dimple for the gas block set screw. Lower barrel shows a pinned low profile gas block.