how to measure barrel diameter?

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[ARCHIVED THREAD] - how to measure barrel diameter?

Posted: 12/13/2005 11:45:04 PM EDT

how do I properly measure my barrel diameter? what tool should I use, tape measurer, ect? I want to order a new railed gas block but do not know what size to get. The barrel I am working on is a heavy type 20 inch barrel. Thanks for any information in advance..................

Posted: 12/14/2005 12:19:46 AM EDT

[#1]

calipers

Posted: 12/14/2005 12:37:32 AM EDT

[#2]

barrels where the gas block/FSB seat are only one of a few diameters, the gas blocks aren't custom made to fit your barrel so the precise size isn't needed.

A1 ("lightweight" or "pencil") contours use a .625 (5/8) seat, A2s use a .75 (3/4") seat and bulls use a couple variations on .8"

Posted: 12/14/2005 4:02:31 AM EDT

[#3]

Quoted:
barrels where the gas block/FSB seat are only one of a few diameters, the gas blocks aren't custom made to fit your barrel so the precise size isn't needed.

A1 ("lightweight" or "pencil") contours use a .625 (5/8) seat, A2s use a .75 (3/4") seat and bulls use a couple variations on .8"

Posted: 12/14/2005 9:05:00 AM EDT

[#4]

thanks for the info............

Posted: 12/14/2005 12:43:23 PM EDT

[#5]

Many "Bull" barrels are also 0.930" diameter at the gas port area.

[ARCHIVED THREAD] - how to measure barrel diameter?

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