WE G39C Upgrade help plz

[HELIflipper03]

I have decided to do some upgrades to my WE G39C by putting on some RA-Tech parts. I want to increase fps, durability, and if possible have stronger blowback. So far this is what i have chosen to buy:

Maple Leaf Monster Rubber Hop Up

RA-tech charging handle

RA-tech steel CNC trigger set

RA-tech firing pin and valve locker

I was just wondering whether anyone thinks there is something here not worth buying, or something else I've missed that is more important.

Thanks

 

[Talltom]

Npas? Ive just got a g39c and converting to a k