shredded piston

[Dude666fx]

Re: shredded piston

I followed your advice sniperjesus and restored the guns parts to stock parts along with the tm piston and built in tm spring, tested with gearbox screwed shut for binding etc all seemed sound when reopened so reassembled gun and tested again without madbull hop unit still worked fine but as soon hop unit and barrel was installed it had feeding problems, so put back standard hop unit which fixed that problem.

semi auto jams up very easily but have been told that happened a lot before, a quick auto clears this but there a way to fix the semi problem?

the madbull ultimate hop unit was working fine before but dont understand why not now? last game played was bio bbs only could this be the cause?

Also the owner would like the m90 spring put back in so this will give me a chance examine the new piston for recent wear.