T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Category_Full Torque-Up Kit it can SPEED-UP the hammer

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

Featured PULL-THE-DOT® three sided locking snap fastener

Weight: 52 g

-Special material & surface finish for smooth and excellent gas flow

Fits for KSC/KWA M4A1 GBB Series

T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Category_Full Torque-Up Kit it can SPEED-UP the hammerT 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.