Custom MP5 Has insane ROF airsoft bb gun

Hey guys and gals I have decided to part with my custom MP5 to fund for a new bike...
The gun is very custom and fires at 53 bbs per second...

It stared life as a TM mp5 costing around £200 and it has cost me £781 with mods
parts added to it
ca metal body front section and main body £100
ca ris £70
foregrip £10
Torch £25
ca stock £20
jg flash hider £5
jg threaded barrel £5


Internal parts
JG 8mm gearbox £15
shs 8mm bushings £5
shs full metal piston £10
shs ar latch £5
shs spring guide £10
dream army m110 spring £10
sorbo pads £10
systema cylinder £20
shs tapet plate £10
shs nozzle £5
shs gear clip £3
shs shims £3
shs 13-1 gears £15
shs high torque motor £30
ASCU mosfet with 3 round burst £90!!!
deans connectors £5
prommy tb barrel £30
fire fly hop rubber £20
fire fly hop nub £15
strike hop arm £25
guarder cocking lever £10

The piston has been swiss chessed and the piston/sector gear has been short stroked by 4 teeth so its running at 310fps but shoots 53 bbs per second

The gun has cost me £781 o.0