Spyder Mr4 Upgrade Help

[Renegade Of Funk]

Hey guys I just bought the MR4 as my first actual marker. Used it yesterday during some cave ball and it worked better than I could imagine. I do want to make some upgrades though.

I'm hoping you guys could help me out. I absolutely HATE the butt stock on the gun and need a longer barrel as well. Anything really that'll improve accuracy and make the marker comfortable to fire. And wondering if its possible to strip the E-trigger off my crap E-bay bought Imagine and use that on the Mr4

One last thing, have a budget of $150 or less.