Author Topic: Drawings for AR-15 Gas Blocks  (Read 2130 times)

Offline Ryo

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Drawings for AR-15 Gas Blocks
« on: April 29, 2009, 12:58:14 AM »
Just wondering if anyone had any drawing/dimension for the .750 gas block.
I was thinking of making a low profile one with switch adjustable gas blowback pressure control.  I llike to makes something like Noveske switchblock.  I really don't know much about the switchblock, but I can guess.  Basically I want to control gas blowback where I can have reduced for suppressed, regular when non suppress, and no blowback.   

Suggestion of design would be cool too.

Offline JFettig

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Re: Drawings for AR-15 Gas Blocks
« Reply #1 on: April 29, 2009, 05:01:18 AM »


The set screw is .295 forward from the shoulder(same as the port) and .500" off the center of the barrel hole. Use a 6-32 tap, also tap it with the gas tube in the hole.
The gas tube hole is .625 off center from the barrel hole. I forget what all the dims are, I don't have them in front of me.

Isn't a switch block a gas block with a straight tube and different gas holes that you spin the gas tube around?

Jon