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Old 09-05-2005, 07:20 AM   #1
ACD
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Excessive receiver wear

Hey All,
Besides using a gauge, is there a way to tell if receiver rail wear is excessive. Should the op slide have some up and down movement, or none.

TIA
acd
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Old 09-05-2005, 09:50 AM   #2
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the OP slide is a very loose fit, it should and does rattle. If it was tight, it would wear the lug on the op slide pretty quick.

Assuming you have an Op slide with good lugs, take the recoil sprin off and then push the handle up and out and run it back in the groove, it should not pop out until it gets to the recess.

If your op slide is jumping, and the recvr rail looks straight by eye, then I would suspect the op slide is worn not the recvr.

BTW, if you feel the "rattle" fit is excessive, but it passes the above test, you can try another op slide, but keep that groove well lubricated and don't worry about it.

another point to consider. On my recent CMP carbine purchase, the index lines were not lined up properly and the op slide was tight...not excessively, but it did not rattle...that was peculiar! This was because the barrel was not lined up correctly with the receiver. If I had a carbine with a very tight op slide I would suspect something was wrong...not the other way round.
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Old 09-06-2005, 12:23 PM   #3
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BTW, and some others can come in on this...I suspect that a worn recvr rail is pretty rare, but an Op slide lug being worn down is not.

What is the manufacturer of your carbine?
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Old 09-06-2005, 03:14 PM   #4
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I agree with Audie. Worn slide lugs are more common than worn receivers. One of the first things I was taught , when buying parts for M14's for assembly, was look at the op-rod lug. If it was not square, or had excessive wear on one side , then don't buy it. Hook was obsessive about proper barrel line-up with the receiver. A mis-alligned barrel-receiver would cause excessive op-rod wear and sight problems. Same with carbines. If the barrel-receiver alignment is off , then excessive wear is certain. I don't have much faith in barrel-receiver line up marks. I use a small level to check for "level" between the barrel flat and the receiver flat. If they are "in-line" then the slide should track true in the barrel guideway and the receiver guide way. This will cut down on the wear. The only other thing to watch out for is a "bent" slide arm. This will cause excessive wear , no matter how well your barrel-receiver lines up. Good Luck.
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Old 09-08-2005, 02:36 AM   #5
ACD
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Well I quess I was worrying for nothing. Checked to see if the op slide came out prematurely and any excessive wear on it, all ok.

thank you.
acd
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Old 09-08-2005, 08:58 AM   #6
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yep, you are good to go. When I got my first carbine my slide was jumping the rail...terrible way to start...now I know that any slide that cannot disengage is a good one, but I would keep that rail lubricated so the slide lug does not wear.
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