T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Category_Full Torque-Up Kit Tokyo Marui HK45 is authentic

Tokyo Marui HK45 is authentic replica and engraved Realistic Marking On Both Slide

Fits for KSC/KWA M4A1 GBB Series

Suitable for Marui G17/ Hi-Capa

it can SPEED-UP the hammer movement and DECREASE the blow-back power

Magazine : 38 Rounds

T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Category_Full Torque-Up Kit Tokyo Marui HK45 is authenticT N. T System APS X HOP UP SYSTEM HOP UP Retrofit Kit for KWA KSC M4 GBBR (370mm) 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. T N. T.