T-N.T. Studio APS-X HOP-UP H+ Inner Barrel for KJ KC02 (510mm) Magazine Case NS2 / System 7 means

NS2 / System 7 means more powerful

As seen in the Movie 'BALLISTIC' by Sever

20 round box magazines

4mm O-ring for o-ring BBU

T-N.T. Studio APS-X HOP-UP H+ Inner Barrel for KJ KC02 (510mm) Magazine Case NS2 / System 7 meansT N. T. Studio APS X HOP UP H+ Inner Barrel for KJ KC02 (510mm) Features : Simplify the original complex components. The inner barrel can be used T N. T. System all series of precision Air cushion inner barrel (O D 8. 5mm) H+ inner barrel(O D 9. 95mm), has been changed to a general specifications , to rid itself of special specifications. Improve the original innerbarrel rotation problems , improve the stability of shooting. Adjustment range from the