AONW: KWA LM4 Sticky Piston Fix
OptimusPrime
19 May 2014
Experiencing the same issue with your KWA LM4 Gas Blowback Rifle? Watch this video from Airsoft Outlet Northwest to learn how to fix it... "Adam shows us how to mod the piston in your KWA LM4 to keep it from sticking and venting gas after extended use. Keep your favorite gas rifle up and running despite wear and tear."