Metal O-rings on bcg tightness?

[richmyster]

Sorry if my wording is horrendous, new to the ar club. I took my ar fully apart yesterday for cleaning, and after cleaning I noticed that I may have spread the top metal o ring open a bit. I'm just wondering what purpose these serve, ( I'm thinking that's what makes the bcg rotate for assembly in the gas block?) and if its any concern if its a bit spread.

Attached is some pics to explain.
Thanks!

 

[Clobbersauras]

I'm curious as to how you would spread it by cleaning it....

I'd replace it anyway. They are cheap and easy to find. Most board dealers should be able to sort you out.

 

[Boltgun]

reassemble your BCG. Put the assembly with CH back into upper. with it seated, turn upper muzzle up - keep your hand behind but not holding the BCG in place. If the BCG falls out easily, then replace your gas rings (the metal o-rings you referred to). New rings will make it harder to for the BCG to "fall out" when you tip up the muzzle.

Boltgun

 

[-[Crosshair]-]

Or just put the bolt into the carrier without the cam pin, firing pin and the pin that holds it (so the bolt isn't maintained in place by anything other than the gas rings) and tilt your carrier so that the bolt faces down. The gas rings should hold it in the carrier and it shouldn't slip out.

Also, make sure that the openings in the gas rings are not aligned.

 

[richmyster]

Yeah it doesn't slip out when I put it into the carrier, it's very snug.

 

[-[Crosshair]-]

Yeah it doesn't slip out when I put it into the carrier, it's very snug.

Then they are good to go.

 

[Sinasta]

Or just put the bolt into the carrier without the cam pin, firing pin and the pin that holds it (so the bolt isn't maintained in place by anything other than the gas rings) and tilt your carrier so that the bolt faces down. The gas rings should hold it in the carrier and it shouldn't slip out.

Also, make sure that the openings in the gas rings are not aligned.

It really doesnt matter if the gaps are not aligned.

 

[-[Crosshair]-]

It's true. My OCD kicks in and I always make sure they aren't, though.

 

[Suputin]

Those are gas sealing rings. They have nothing to do with the bolt rotating in the carrier.

 

[Conte]

The spread is normal. When you put the bolt in the carrier they will get squeezed closed.

 

[CarbineOne]

You can actually shoot an AR with only a single gas ring present on the bolt itself. It beats that one ring to death, but the 'align the gaps' rule is a complete myth.