Guidance on an M1 carbine

[A.J. Holst]

Function test yesterday 

2 15 round mags, flawless, 1 30 round loaded to 25, flawless.

Then it started slowing down, weak ejection, could see the slide recoiling 2/3 to 3/4, enough to cock the hammer, but no far enough back to strip the next round from the mag.

Planning on a deep clean ( which I thought I had) 

Best way to clean the gas block and piston without disassembly?

Edited July 18, 2016 by Gotthegoods

[quietguy]

I would start with a good clean and lube.  It sounds like fouling to me.  

About the only other thing that could cause those symptoms would be a weak slide spring, but I would think that progressively getting worse would be unlikely.  

[A.J. Holst]

I'm getting awful good at dis- and re-assembly.

 

 

[Garufa]

Does the piston move freely?

[A.J. Holst]

35 minutes ago, Garufa said:

Does the piston move freely?

It's sticking.

A tap will will extend it.

 

Edited July 18, 2016 by Gotthegoods