Well, I screwed up my second mag so $50 goes bye bye haha. I was happy I was able to get around 460 FPS stable. So I decided to sand it a bit more, and boom, I screwed up... It's like the RA-Tech NPAS System, micro millimeters seem to make a huge difference T.T
It was able to do 170 FPS only when the bbs were lucky enough not to jam... Thankfully this was with my originally messed up mag...
I probably sanded it 0.5 mm too much, so I put a tiny layer of JB Weld and hope it works. JB Weld doesn't take impacts well I think, but I hope since it's not even a mm difference, it might work as a temporary solution lol...
I guess I will be waiting for the so-called M100-120 Hammer Spring sample I will be receiving soon, if that works, then we could save $$ using the more common high fps mags...
Reason why you WANT to upgrade to steel hammer:
Mine hasn't gotten that bad yet, but you can already see the wear on mine haha...