G&P mechboxes are tough that's for sure. I ran my SPR for a year with a 190% PDI spring in it shooting at 450+ FPS and not a sinlgle issue with the shell. Tappet broke though, no surprise there.
I think I put about 30,000 through it last year and it's still going strong. Rate of fire with a 9.6v battery was 14-15 rounds per seconds.
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Age verifier Northern Alberta
Democracy is two wolves and a sheep discussing what's for dinner.
Freedom is the wolves limping away while the sheep reloads.
Never confuse freedom with democracy.
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