in general whats a good hop up

[NHtucsonaz]

ima be upgrading a A&K SPR MOD 0 and was wondering what brand one piece hop up unit would be best, i have a kwa GB thats in the gun, and does any one know the inner berrel length for that gun cause ima be getting a TB for it too, thanks

[xblackthund3rx]

Well I know it had a 509mm in it before because thats what I use in my gun now but you could put a longer one in it if you dont mind it sticking into the flashhider and I have a G&G plastic hop up that I think is pretty good

[AxisOfOil]

King Arms hopup unit is about the best. The Prommy Neo Strike Chamber is also very good. I've heard that the madbull ultimate 3-in-1 or whatever it's called is pretty good as well, but I don't have first-hand experience with them.

Throw an h-nub and g&g green bucking in there with that hopup and you're golden.

[NHtucsonaz]

allright thanks