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Posted: 10/17/2003 5:58:20 PM EDT
Okay, I have three uppers with me. 2 M4's and a 16" All have their own bolt carrier group. On the 16" upper when I turn it upside down the bolt always slides back. On the other two the bolt doesnt move. Is this normal? Do I need to worry about it? The 16" has been shot quite a bit (4000+) and the others I don't know about.

What say you?

SGtar15
Link Posted: 10/17/2003 6:08:54 PM EDT
[Last Edit: 10/17/2003 6:09:31 PM EDT by DevilsAdvocate]
Its loose, but probably OK...The weight of the carrier is enough to fall down and unlock the bolt.

If you keep it dirty, you will probably not have that problem.
Link Posted: 10/18/2003 10:21:47 AM EDT
Sound like the gas rings on your 16" upper have more wear than the ones in your M4 uppers.
Link Posted: 10/18/2003 10:24:55 AM EDT

Originally Posted By gus:
Sound like the gas rings on your 16" upper have more wear than the ones in your M4 uppers.



***WINNER***, we have a WINNER!!!!!

IMHO,
Mike
Link Posted: 10/18/2003 11:08:56 AM EDT
Sgtar15, replace gas rings and lube them and yourself with Jim Beam. It'll be all-right tomorrow.

Danny
Link Posted: 10/18/2003 4:28:58 PM EDT
Ummmm

Gas rings? DO you mean those thingies on the bolt??

SGtar15
Link Posted: 10/19/2003 2:16:11 AM EDT
Consider it well worn in upper. It probably feels smoother than your others. The uppers that have been worn in with a few thousand+ rounds have always been the best for me. Keep shooting it.
Link Posted: 10/19/2003 9:13:43 AM EDT

Originally Posted By sgtar15:
Ummmm

Gas rings? DO you mean those thingies on the bolt??

SGtar15



yup!
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