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-   -   Bush xm-15 bolt carrier question (http://www.firearmstalk.com/forums/f20/bush-xm-15-bolt-carrier-question-40623/)

talbertjm 04-01-2011 03:22 AM

Bush xm-15 bolt carrier question
 
hello, my question is in reference to something i saw on a you tube broadcast, nssf shooting sportscast was the name of it. The man said "to test your gas keys on your bolt/bolt carrier, (with the bolt out of the rifle of course, with assembled bolt and carrier), extend the bolt as far as it will go, lay bolt face on hard flat surface. if the bolt collapses into the carrier on its own, then the gas keys could be weakened, old, or bad, have them looked at or replaced.

well hell, my rifle is only one year old with 1500 rounds put through it, ( lake city ammo ), is this common for a bush or is mine one of those hit or miss weapons? just curious, also, not new to firearms just to ar's

thank you,
joe

Quentin 04-01-2011 04:33 AM

This would be the sign of worn gas rings, not gas key screws. Are you saying your BCG fails the test? 1500 rds shouldn't wear the rings that much but fortunately rings are cheap.

WoodysKJ 04-01-2011 01:48 PM

Post a link to the video, please

GunDoc 04-01-2011 02:20 PM

+1 Quentin. It would be worn gas rings, of which the XM15 has three from the factory. If the bolt falls under its own weight it's time to inspect it. My XM15 has thousands of rounds through it without any problem, but I do check it every time I clean it. From the factory the gas key wasn't staked very well on plenty of rifles, so check your gas key as well and have it staked if it ever feels loose. Proper staking isn't as easy as it sounds, so when the time comes borrow a MOAKS tool or pay someone to do it right.

talbertjm 04-01-2011 08:40 PM


skip to the time: 23:30

talbertjm 04-01-2011 08:40 PM


skip to the time: 23:30

and he does call them keys, not rings.

thank you

Quentin 04-01-2011 09:07 PM

Slip of the tongue then, I'm not going to watch the video (I could clean three ARs in 28 minutes! :D) but from your description he meant gas rings.

WoodysKJ 04-01-2011 11:48 PM

I watched that video. MASTERFUL production. Guy in a black shirt, black gun in a shaded area with back lighting. ABSOLUTELY NO detail I though it would have been better if you could actually see what he had in his hands.

talbertjm 04-02-2011 02:42 PM

thank you for all reply's, next step is to change out the gas rings.

GunDoc 04-02-2011 02:45 PM

I do my own videos and I slip up and call things the wrong name sometimes. By the time I get around to editing the original project is out the door and gone. I'll forgive him.


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