KSC System 7 Hop Up accuracy Mod

This is to enhance the accuracy of all modern KSC guns, anything which uses a negative pressure system (NS2).

Basically after this mod, it will decreases the veering and overhopping experienced with KSC guns, and will pretty much make KSC guns shoot flat and straight.

Downside is that after the mod, anything lighter than 0.25gs will roll out of the barrel during cycling. Heavier BBs will be required.