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AR-15 Gas Blocks and Tubes

Browse through our wide list of high-quality AR 15 Low Profile Gas Blocks and Tubes

The AR 15 gas block is a part of gas system that replaces the standard front-sight base.
On the AR, there is a small “gas port” (small hole) in the barrel that vents gas with READ MORE

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AT3’s instructional videos on every aspect of the AR15 are invaluable. I watched them all on YouTube over the past week, and my first AR15 is being delivered today. I am looking forward to tinkering with my new rifle using AT3’s knowledge base as my guide.

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First I wanna say amazing customer service my items arrived really fast and packaged very safely. Second the FDE is a perfect match for Magpul products. I paired my AT3™ FF-ML 10.5″ Complete AR 15 Pistol Upper with Franklin Armory lower with bfs||| trigger .. AMAZING! GOT A FOREVER CUSTOMER HERE AT3!

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Browse through our wide list of high-quality AR 15 Low Profile Gas Blocks and Tubes

The AR 15 gas block is a part of gas system that replaces the standard front-sight base.
On the AR, there is a small “gas port” (small hole) in the barrel that vents gas with every shot. This gas travels through the gas block and gas tube into the receiver, where it powers the bolt carrier group and auto-cycles the next round.

A low-profile is a smaller gas block that is made to fit under a free float quad rail. There are also “railed” gas blocks that allow you to mount an iron sight on the gas block.

To learn more about AR-15 gas systems and how they function, check out our article: “Carbine, Mid, or Rifle? A Beginner’s Guide to AR15 Gas Systems”

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