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  #1  
Old 08-23-2011, 04:31 PM
98Charlie 98Charlie is offline
 
Join Date: Oct 2009
Location: WI
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Default M1 carbine malfunction...

My IBM carbine is short stroking. The bolt doesn't retract far enough to eject the empty case, and tries to run it back into the chamber, causing a jam. I took my gas piston nut off and the piston was very hard to get out. It was very gummed up, perhaps with very old, gummy gun oil. The piston nut was also very gummy inside where the piston slides back and forth. I hope to get to the range soon to make sure this was my problem with short stroking.
Has anyone else had the same problem with their carbine?
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  #2  
Old 08-23-2011, 06:34 PM
gunny gunny is offline
 
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Yup. Soak the cylinder overnight with some kroil or other good penetrating solvent. Then brass brush and blow all the gunk out. Should solve the problem.

Gunny
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  #3  
Old 08-23-2011, 11:13 PM
6 Ring 6 Ring is offline
 
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Did you clean the hole out with a .070 drill bit turned by hand? Don't put the piston back in without cleaning out the hole.
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  #4  
Old 08-24-2011, 01:14 PM
98Charlie 98Charlie is offline
 
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Quote:
Originally Posted by 6 Ring View Post
Did you clean the hole out with a .070 drill bit turned by hand? Don't put the piston back in without cleaning out the hole.

Oh, now you tell me....
I think I'll be ok though. I'll have to wait until next week to get out to the range.
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  #5  
Old 09-02-2011, 09:52 PM
98Charlie 98Charlie is offline
 
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Quote:
Originally Posted by 98Charlie View Post
Oh, now you tell me....
I think I'll be ok though. I'll have to wait until next week to get out to the range.
Well, I went out to the range the other day and same problem. I guess I'll take the gun apart again and clean out the gas hole. If that doesn't do it, I'm thinking something with the bolt, ejector, extractor, etc. Or maybe a too strong recoil spring?
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  #6  
Old 09-02-2011, 10:13 PM
gunny gunny is offline
 
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Hmmmm....did you put a new spring in just before the problem started? If it is one of those aftermarkets, check the length measurement. Leave the spring out, reassemble the action, and run it through cycles manually to see if you have any binding goin' on. Use a punch greater in diameter of the ejector and make sure it springs back out after you push it in. Extractor shouldn't be the problem. But yeah, the gas hole may be still plugged. I always do the simplest, quickest, easiest checks first when troubleshooting.

Gunny
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  #7  
Old 09-02-2011, 11:10 PM
sunray sunray is offline
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Clean the bolt. Far more likely to be a bit of crud in or under the ejector than a gas issue. And change ammo. Like Gunny says, start with the simple stuff.
"...clean the hole out with a .070 drill bit..." How do you figure to get at it with a drill?
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  #8  
Old 09-02-2011, 11:18 PM
sigman2 sigman2 is offline
 
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I use a pipe cleaner on the gas ports.
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  #9  
Old 09-02-2011, 11:19 PM
gunny gunny is offline
 
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Nawww...don't drill it out. Just use the bit as a probe/scraper. I've used a large paper clip, too.
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  #10  
Old 09-03-2011, 08:20 AM
charlie E charlie E is offline
 
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No one mentioned ammo
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