Piston help Dmr

hello there, im new here, and have been playing for roughly 5 months. I love it!! so i want to not be an asshole and just start asking questions, this is my current setup.


i am a minimalist, the simpler something is, the better
tefloned 6.01 509mm TBB
angel custom bucking and cylinder
matrix seal components
regular ass scope from a .22

ok heres my issue, i have a m130 spring in this and have already stripped two pistons this week, it is semi auto.

can you recommend a good piston that can withstand this? i hoping to eventually put m150 spring in this.

btw im new at airsoft not at shooting