The Troy Industries .936 Low-Profile Gas Block (brand part number SGAS-936-00BT-00) sets a bull-diameter barrel up for a free-float handguard without adding bulk at the gas port. Troy machines it from 4140 pre-hardened steel and finishes it to a Mil-Std manganese phosphate spec, giving it the corrosion resistance and wear life a duty or range rifle needs. Sized to fit .936" barrels, it works across .223, 5.56, and .308 bull-barrel builds and any other caliber sharing that gas block diameter. Its low-profile shape lets any rail system designed to install over the gas block sit flush, keeping the upper’s profile clean.

Key Specifications

• Sized for .936-inch diameter bull barrels for a direct, low-profile fit.
• Machined from 4140 pre-hardened steel for strength and heat resistance at the gas port.
• Finished with a Mil-Std manganese phosphate coating for corrosion resistance.
• Compatible with .223, 5.56, and .308 bull-barrel rifles and other calibers sharing the diameter.
• Built as a low-profile design that keeps the upper’s silhouette flush.
• Made for any rail system designed to install directly over the gas block.
• Made in the USA to mil-spec tolerances.
• Weighs approximately 0.145 lb, adding negligible weight to the barrel.
• Ships without a gas tube roll pin, which is sold separately.

Frequently Asked Questions

What barrel diameter does this fit? .936-inch, common on .223/5.56 and .308 bull barrels.

Does it work with a free-float handguard? Yes, its low-profile shape is built for rail systems that install directly over the gas block.

Is a gas tube roll pin included? No, the gas tube roll pin is sold separately.

Buy the Troy Industries .936 Low-Profile Gas Block – Black

Get a mil-spec gas block sized right for your bull barrel. Order it from our Troy Industries lineup, part of our gun parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.