T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Manufacturer_VFC 04 mmLength: 285 mmMaterial: Brass/

04 mmLength: 285 mmMaterial: Brass/ TN coatingPrecision barrel at 6

XM177E2 Series

Provide superior durability and anti-scratch ability

Suitable for Tokyo Marui M4A1 MWS Series Airsoft Gas Blow Back GBB Rifle

T-N.T. Studio APS-X HOP-UP SYSTEM HOP-UP Retrofit Kit for KWA/KSC M4 GBBR (370mm) Manufacturer_VFC 04 mmLength: 285 mmMaterial: Brass/T 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.