Tokyo Marui Hi-Capa 5.1 Carbine conversion kit

Get one:

.stl for your own printing (current revision) on CGTrader

.stl on Cults

Carbine conversion kit for airsoft pistol Hi-Capa by Tokyo Marui, WE, KJW. This updated version finally supports TM Hi Capa Gold Match, KJW Hi Capa (even 6 inch version) and many others.


  • Hera styled stock
  • 6 inch (KJW) extender part.
  • Requires rotary tool (Dremel) and drill working because Body design is optimised for very easy printing. Model is without through holes so there are no overhangs.

Design features:

  • For Tokyo Marui Hi-Capa 5.1 only because of its lower accessory rail
  • Fast pistol release (holster style)
  • Optional mounts for even better fixation of pistol with slide release screw
  • Spring loaded lock
  • 6 picatinny rails
  • Osprey-style hollow suppressor rotation mounted
  • M4/M16 stock compatible
  • Folding stock
  • Ambidextrous charging handle
  • Access to all original controls
  • Silencing design

3d printing related features:

  • Tested to successfully print on home-grade FFF/FDM printers
  • Checked tolerances of shrinking plastic like ABS or PETG (0.5-1%)
  • M3 Hex nuts replaced to M3 Square nuts because they better fit to printed plastic
  • Splitted suppressor mount for easier printing
  • Single part body 253 mm can be printed on delta (kossel) printers
  • Improved overhanged areas angles for easier printing without supports
  • Cutouts for less material usage and weight reduction

Printed model is sanded and dyed with black semi-matte paint.

Material: PETG
Tested on Tokyo Marui GGBB Hi-Capa 5.1

Current revision with Gold Match, KJW and all other hicapas support:

Previous revision:

Sanded and painted:

Renders of initial release:

Initial release in the field:

Experimental baffles and folding stock (on request):

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