thanks
for my bday yesterday i got a kwa km4 ris,9.6 1600 mah battery, smart charger, 2 extra highcap mags, and a double mag pouch/ all these things are awsome
but i may buy a moe handgaurd, hop up system, and a 6.03mm tightbore barrel
can anyone tell me what a good hop up system and 6.03mm tightbore barrel are good and compatible with the kwa?