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10-96 · November 10, 2008, 11:39 PM

Measure from the back of the hole in the gas block to the back edge of the gas block with a micrometer. Transfer that measurement to the bbl and mark it. Now line up your block with your mark. Now what I did was to make a couple of wraps of electrical tape on a fired case and GENTLY put it part ways into the chamber. Now, blow into the bbl and place your finger in the receiver and over the gas tube to feel if any air comes out. What would work better would be to have an air compressor, that way you could free up a hand or two to adjust the block to feel for more air if a movement needs to be made. If I'm not mistaken, the distance from the shoulder on the bbl to the face of the block should be 7/32- but my mic won't read fractions and I've lost my cheat sheet, so I used the marks.

November 10, 2008, 11:39 PM	#6
10-96 Senior Member Join Date: October 19, 2005 Location: Tx Panhandle Territory Posts: 4,159	Measure from the back of the hole in the gas block to the back edge of the gas block with a micrometer. Transfer that measurement to the bbl and mark it. Now line up your block with your mark. Now what I did was to make a couple of wraps of electrical tape on a fired case and GENTLY put it part ways into the chamber. Now, blow into the bbl and place your finger in the receiver and over the gas tube to feel if any air comes out. What would work better would be to have an air compressor, that way you could free up a hand or two to adjust the block to feel for more air if a movement needs to be made. If I'm not mistaken, the distance from the shoulder on the bbl to the face of the block should be 7/32- but my mic won't read fractions and I've lost my cheat sheet, so I used the marks. __________________ Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day) I suspect a thing or two... because I've seen a thing or two.