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The Range
Rifle & Shotgun Discussion
AR gas block sizes?
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<blockquote data-quote="BeRotten" data-source="post: 2673001" data-attributes="member: 2317"><p>The different sizes of gas block are in relation to the diameter of the barrel where the gas block mounts...mostly. The common sizes are .625 for a light weight barrel, .750 for a heavier barrel, .936 for a heavy barrel. The barrel manufacturer should provide this information. The distance form the stop for the gas block and the gas port is pretty much standard. There are different heights of gas blocks too. Low profile for mounting under a free float or higher for mounting sights on. And the standard A2 style that acts as a front sight and gas block. Hope this helps.</p></blockquote><p></p>
[QUOTE="BeRotten, post: 2673001, member: 2317"] The different sizes of gas block are in relation to the diameter of the barrel where the gas block mounts...mostly. The common sizes are .625 for a light weight barrel, .750 for a heavier barrel, .936 for a heavy barrel. The barrel manufacturer should provide this information. The distance form the stop for the gas block and the gas port is pretty much standard. There are different heights of gas blocks too. Low profile for mounting under a free float or higher for mounting sights on. And the standard A2 style that acts as a front sight and gas block. Hope this helps. [/QUOTE]
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