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AT3 Gas Blocks

The Best Value in AR-15 Gas Blocks

AT3 Tactical Low-Profile Gas Blocks work great with any free float handguard/quad rail system where a low-profile design is needed.
All AT3 Gas Blocks feature a 1 year warranty and are backed by the 110% AT3 Guarantee!
33 reviews
$29.99 $35.99

This premium Stainless Steel Micro Gas Block comes in 4 sizes: .625", .75", .825", and .936". We have a fit for every barrel! FEATURES: 4 sizes available: .625", .75", .825", and .936 (.75" is the most common size, but always measure the barrel if you aren't sure!) Low profile design, perfect with our quad rail systems Steel construction (better than...

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18 reviews
$32.99 $38.99

The AT3 Long Low Profile Gas Block is designed to cover up barrel scars that are left after removing an AR-15 front sight base FEATURES 3/4" (.75") size – works with any .75" AR-15 barrel Perfect for use with long AR15 handguards that cover the gas block Length is designed to cover up blemishes on barrel after removing front sight base...

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4 reviews
$15.99 $18.99

A quality, USA made stainless steel gas tube for carbine-length gas systems. Works great with AT3 Tactical Gas Blocks.  SPECIFICATIONS: Material: Stainless Steel Finish: Natural Length: 9 3/4" Use for: Carbine length gas systems (7" gas systems) NOTE:  Hogue Handguards require a bent gas tube. Instructions that describe this can be found at this link:

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6 reviews
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A lightweight aluminum gas block with top and bottom picatinny rails - great for mounting backup iron sights on the top and a flashlight, laser, or even bipod on the bottom FEATURES Gas block with top & bottom picatinny rails - top rail sits at height of flat top receiver One piece construction, solid fit! 3 rail slots on the...