New .308 build - Gas tube seems loose in the GB

[RetardedTiming]

Build consists of a Mega MA-TEN monolith set and a Noveske 18" 7.62 barrel. I bought a new Troy .875 GB to replace the GB that comes with the barrel because it is pinned and set screwed which won't work with the monolith. The Troy uses two set screws instead, and slides easily on the barrel. After pinning the tube in place, it doesn't seem tight like it should. It actually wiggles about the roll pin slightly.

Should I be concerned? Think the gap will eventually seal itself? Thinking I should have just sprung the extra $30 for the PRI.

 

[Ballista One]

Re: New .308 build - Gas tube seems loose in the GB

The only way to verify if the gas block is correct is to gage to the hole in the gas block. It should be 0.180. The gas tube may be the culprit also. The tube OD should be 0.179.

 

[RetardedTiming]

Re: New .308 build - Gas tube seems loose in the GB

Thanks for the specs my friend. I will check it out with the Mitutoyo tonight when I get home.