Bolt cam tension

[ray1970]

Now I'm mildly confused. The gas rings don't serve their normal purpose since this is a piston rifle, right?

[Great-Kazoo]

You have a ZM, very nice.

[CHA-LEE]

Now I'm mildly confused. The gas rings don't serve their normal purpose since this is a piston rifle, right?

They don't but evidently you still need the tension from the gas rings to keep the bolt from camming over too soon.

[275RLTW]

They don't but evidently you still need the tension from the gas rings to keep the bolt from camming over too soon.

My PWS runs without any gas rings. Interesting.

[Kaiser.Shooter]

No gas rings needed in a piston AR, most likely it's a carrier drag if you see the upper wear. If that's an issue POF has a solution for it POF-USA .223 Roller Cam Pin:

[CHA-LEE]

No gas rings needed in a piston AR, most likely it's a carrier drag if you see the upper wear. If that's an issue POF has a solution for it POF-USA .223 Roller Cam Pin:

That is a great idea. I will order one of these bad boys.

[Kaiser.Shooter]

If you would like to give one a try you are welcome to borrow it. I'll go someday this week to BLGC so you can join me or test it wherever you can

[CHA-LEE]

If you would like to give one a try you are welcome to borrow it. I'll go someday this week to BLGC so you can join me or test it wherever you can

Thanks for the offer. But I just ordered one and should get it some time next week.

[Kaiser.Shooter]

Right on! I use them in all my piston AR's.
Another good add to prevent carrier drag would be a bolt spring sold by adams arms or buy one at ace hardware (compression spring #6) cut it shorter, remove the gas rings and install the spring.

[brutal]

While I haven't tried it, I believe my Sig716 user manual states the gas rings aren't necessary.

Sounds like some piston guns need them for proper timing, some don't.