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AR15.COM
9/7/2015 9:25:36 PM EDT
I was going to switch the piston on my AAC 9mm Evolution but once I took the end cap off the thing seems stuck. I can't move it forward and back a bit but no rotation at all.

Advice?
9/7/2015 9:34:36 PM EDT
[#1]
Use a little CLP or something similar then screw the can onto the host gun and try to work it loose.
9/7/2015 10:05:13 PM EDT
[#2]
Kroil.
9/7/2015 10:07:00 PM EDT
[#3]
So the piston should just slide out once I have the end cap off right?
9/7/2015 10:16:28 PM EDT
[#4]
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Quoted:
Kroil.
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This.  It's what we used to do.  Soak it.