T-N.T. APS-X HOP-UP System Heavy inner barrel / H+ kit
| 265mm/11" 275mm/11.5" | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel x1 |
| 320mm/12.5" | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel x1 |
| 370mm/14.5" | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel x1 |
| 430mm/455mm | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel 430mm x1 ●for VSR/VSR-DS sniper |
| 510mm/520mm | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel 510mm x1 ●510mm:VSR/KJ-KC02 520mm:A&K M24/CA M24. |
| 550mm/554mm | ●T-N.T. HOP bucking x1 ●T-N.T. H+ Precision Air-cushion Inner barrel 520mm x1 ●550mm:VSR/ARES-AS01. 554mm:VFC-M40A5. |