OK. I'm looking for a bit of guidance from the hive. I have a stag arms lefty upper I purchased from stag. The bolt has always been on the loose side but it is now rediculous. The gun still runs but if I hold the bcg with the bolt down it will damn near go forward under its own weight. Much less the normal test of extending the bolt and putting it bolt down on the table. It collapses before I even release the full weight of the bolt carrier.

So I've tried 3 different sets of gas rings including one of the one piece rings with no impact. Is there any easy way to see if it's the gas run on the bolt carrier vs the bolt, or I'm I better off bying a new BCG?

I called stag and was told I'm out of luck because it wasn't purchased as a complete rifle.  Rifles get lifetime warranty and everything else is apparently 1 year.

Thank you

I appreciate the quick response.  Very hard to get a pic but the chrome looks worn but not pitted/flaking.  The bolt will partially collapse into the carrier when placed on end with bolt up.

https://photos.app.goo.gl/eg79YSA3jtL2BumRA

I appreciate the quick response.  Very hard to get a pic but the chrome looks worn but not pitted/flaking.  The bolt will partially collapse into the carrier when placed on end with bolt up.

https://photos.app.goo.gl/eg79YSA3jtL2BumRA

Thank you again sir. The information was very helpful. I think I may have figured this out. The current rings are the McFarland 1 piece which I know are non directional. However, I didn't realize until reading the McFarland info that the 1 piece rings won't pass the standard bolt test while still sealing.

Sorry for not catching that... I should have connected those dots.

Std gas ring diameter is .512"+/- .001.

Bore/gas ring run is .4984" min after finish application.


I'd be grabbing some measurements.

Thank you. My calipers aren't long enough to get to the gas ring run. I can get the front and fist step down size which are .530 and .522 (this may be my calipers being to wide at the base). I'll check the gas ring diameter when I get home.

Thank you sir. I'll look into that

Grainger sells pin guages for ~$20, I should have mentioned that as you are correct about dial calipers/depth.

Thank you

I would inspect the interior of the carrier for any burrs or other problems, and clean it with some carbon remover. You are putting your drop of oil on the rings aren't you?

Unless you are having actual function issues, I would get some spare rings and not worry about it beyond that. Put a new set in every 1000 rounds if it worries you. I would not recommend the one-piece rings.

Inside of the carrier looks good. No burs or defects just some normal wear patterns in the chrome. Yes I do always oil the gas rings.  I agree and maybe im over thinking it. Just want to be sure with this being my primary go to suppressor host.