yeh i am alive but im spending more time on fa than here

I recently picked up a JG mp5-a4 RIS for £40, it was compliantly taken apart and in bits, as a project. Tappit plate was broken when I looked at all the bits over and that was it. luckily I had gotten a free gearbox with my other jg mp5 =) though it being a CA gearbox it just wouldn't fit in the JG body, being too fat, so I took the tapit plate from that and put it in the rebuilt JG gearbox and it fitted fine. I was having great fun putting it together and spraying over the ugly blue two-tone, until it came to test fire it... Grind clunk... the piston jammed and the pinion gear was grinding, at this time I didn't know it was but I learnt