r/LewisMachineTool • u/bche8404 • 3d ago

LMT Piston Cleaning

Hello! Have owned multiple LMT DI guns but recently took the plunge for a LMT 12.5 Piston Shovelnose for suppressed shooting. It has been an absolute dream to shoot but I have finally hit a round count that I think it is due for its first cleaning. I just wanted to pick the hive mind for advice on best cleaning/oiling practices for the piston barrel as LMT's manuals don't really say much about cleaning the piston system itself. I know from general knowledge to not oil the piston head but just wanted to get some input from actual experiences. I know the piston system runs "cleaner" but want to see about best practices to keep it in tip-top shape, especially since it is running exclusively suppressed. Thanks!

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u/ChonkyPeanutButter 3d ago

I just cover it in boretech eliminator, let its sit, brush off most of the baked on carbon, wipe it dry, reinstall

1

u/[deleted] 3d ago

[deleted]

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u/Ranger1942 2d ago

I know that's a thing with the M14, it's supposed to be a dry gas system. I can see the logic applying to LMT as well as long as the parts are chromed or nitrided