by Dannick » Mon Mar 14, 2011 5:50 pm
I'd be really interested to see the performance on that GBB M4 and also the aftermarket compatibility. If it's "just another GBB M4" then whopie-dee-freakin-do, but if they actually make a reliable system, it might be something worth looking into.
Systema PTW
VFC HK416
KSC USPc
KSC G19