The KAK Low-Profile Gas Block, .750in, Set-Screw (brand part no. AR15-UP-001) is sized for a .750-inch barrel journal, a common gas block diameter on AR-15 barrels. Kak Industry Llc. built this gas block with a low profile specifically so it clears a free-float handguard, letting the handguard run the barrel without contacting the block itself. It mounts using a set-screw retention system rather than a taper pin, which makes it straightforward to install and remove during a build or barrel swap. A properly fitted low-profile gas block like this is essential to correctly routing gas from the barrel’s gas port to the bolt carrier under a free-float rail.

Key Specifications

• Sized for a .750-inch barrel journal, a common gas block diameter on AR-15 barrels.
• Uses a low-profile design to clear a free-float handguard.
• Mounted with set screws rather than a taper pin, for straightforward installation and removal.

Frequently Asked Questions

What barrel journal size does this gas block fit? A .750-inch barrel journal, a common size on AR-15 barrels.

How is this gas block retained on the barrel? With set screws, rather than a taper pin, making it easier to install and remove.

Buy the KAK Low-Profile Gas Block, .750in

Route gas correctly under a free-float handguard with a low-profile block sized for a .750-inch barrel. Browse Schaefer Defense’s AR gas system parts and order from our Lubbock, Texas gun shop — we’ll get it out to you as soon as it’s ready to ship.