The Troy Industries Low Profile Gas Block (brand part no. SGAS-A4L-00BT-00) is a .750-inch diameter gas block machined for rail systems that need to extend over the gas block itself. Built from hardened steel with a black oxide finish, it’s sized and shaped to fit all M4 carbines as well as M16A2, A3, and A4 rifles, giving builders a durable, drop-in gas block for a wide range of AR-15-pattern uppers. Because it’s a low-profile design, it clears free-float handguards cleanly while still reliably metering gas to the bolt carrier group. It’s made in the U.S.A. to standard AR-15 gas block tolerances.

Key Specifications

• It’s sized for a .750-inch diameter barrel journal.
• It’s machined from hardened steel with a black oxide finish.
• It’s a low-profile design built for handguards that extend over the gas block.
• It fits M4 carbines and M16A2, A3, and A4 rifles.
• It’s made in the U.S.A.

Frequently Asked Questions

What rifles is this gas block compatible with? All M4 carbines and M16A2, A3, and A4 rifles.

Will it fit under a free-float handguard? Yes, it’s a low-profile design built for rail systems that extend over the gas block.

Buy the Troy Industries Low Profile Gas Block

Get a durable, low-profile gas block built to mil-spec dimensions with the Troy Industries .750 Gas Block. Shop more Troy Industries rifle accessories and parts and get fast shipping from our Lubbock, Texas gun shop.