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11/22/2017 10:05:29 PM
Posted: 9/14/2004 2:17:02 PM EST
I just finished my post sunset AR carbine and I am having a problem.

The bolt will not go back far enough for the hold-open to engage. I have tried mags an engaging it maually with no success.

I replaced the fixed stock with an M4 stock. Could the problem lie in the stock replacement???? I have never had this problem before.

Thanks,
tb1
Link Posted: 9/14/2004 2:25:50 PM EST
Did you replace the buffer and spring?
HFG
Link Posted: 9/14/2004 2:30:45 PM EST

Originally Posted By HipFiredGun:
Did you replace the buffer and spring?
HFG




+1
Link Posted: 9/14/2004 2:33:34 PM EST
Yep. I replaced the stock, buffer, tube, and spring. The bolt is about 1/8" from opening far enough.
Link Posted: 9/14/2004 2:35:23 PM EST
Let me get this straight - will the bolt and carrier group not physically move back far enough to lock back?
HFG
Link Posted: 9/14/2004 2:36:26 PM EST

Originally Posted By HipFiredGun:
Let me get this straight - will the bolt and carrier group not physically move back far enough to lock back?
HFG



Yes, that is correct.
Link Posted: 9/14/2004 2:57:06 PM EST
Rifle buffer in carbine tube.....
Link Posted: 9/14/2004 3:02:19 PM EST

Originally Posted By dmuldrew:
Rifle buffer in carbine tube.....



Nope, I have the carbine buffer laying here next to the rifle buffer.

The springs are the same length though.
How much different should the length of the springs be?
Link Posted: 9/14/2004 3:05:02 PM EST
My rifle and carbine/collapsible spring is approx the same length.


Have you tried the bolt just in the upper and just in the lower without teh spring to see if it has any interference with the hammer?
Link Posted: 9/14/2004 3:23:43 PM EST
Wrong spring.
HFG
Link Posted: 9/14/2004 3:24:56 PM EST

Originally Posted By HipFiredGun:
Wrong spring.
HFG



How much difference should there be in the spring lengths?

Can a rifle spring be cut to a carbine length?
Link Posted: 9/14/2004 3:25:31 PM EST
Or check that the gas key is staked down correctly and not binding on the rear of the carry handle.
HFG
Link Posted: 9/14/2004 3:46:47 PM EST

Originally Posted By HipFiredGun:
Or check that the gas key is staked down correctly and not binding on the rear of the carry handle.
HFG



Check.
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