R hop or bridge hop the barrel
Get a 22 TPA high torque motor
SHS 13:1 gears
Get rid of the Gate FET, put in a smaller and more durable 3034 FET
Get rid of your shitty Li-Po, get some better 25-50C buffer tube ones
This is the 417 DMR I sold a while back:
http://www.airsoftcanada.com/showthread.php?t=169121