by Dannick » Mon Aug 30, 2010 3:05 pm
Yea, what vulrath said.
As long as it's going into a 2GX KWA though, it shouldn't bother it. I honestly think that the 509mm would be a bit too long, seeing that the stock barrel is 343mm (correct me if I'm wrong.) and most barrel extensions run around 100-150, at least for an average size that will still look tacti'cool' on an M4.
Systema PTW
VFC HK416
KSC USPc
KSC G19