[Reliku]

Well first of all if you're shooting .4g bb's, get a 400mm barrel, not a 700mm barrel.

Also, don't get your hopup stuff from taiwangun, they're not that good. Although the guarder black one can be flat hopped to give pretty good results, they all are AEG buckings so you will need an aftermarket chamber first.

My suggestion would be:

-Install the piston & spring guide from the kit you bought to get around 500 fps
-Buy an AA chamber along with a 400mm barrel with an AEG cut (brand depends on your budget, madbull steel bull is my personal recommendation for a good price/quality)
-Buy a maple leaf bucking & nub (again, AEG version, 70 degrees monster buckings work great)

That should give you a pretty decent rifle.

Also, please make an introduction post on the forum, it's a rule :tup:

 

[Reliku]

I always kept wondering how it is possible that such a low ratio build yields so much energy with your .4g bb's in your type 96 1tonne, but it got pretty obvious a while ago: piston speed :hehe:

500mm will work yeah, but shorter is better for the sake of a good ratio (better efficiency) :tup: