KJ Works' version of the Hi-Capa comes with a KJ red nozzle installed denoting that it is CO2 ready right out of the box. The slide and frame are full metal and powder coated in a nice jet-black color.
While not as powerful as the CO2 version (350 fps) with this gas version clocking in at 280 FPS on TOP gas, the lower power is preferable for some indoor gamers looking to engage at extremely short ranges or are otherwise looking to avoid clothing damage as much as possible.
It has the added bonus of the reduced wear and tear on your gun as well as of course the cheaper running cost of a TOP/Propane powered gun instead of something which consumes a whole CO2 Capsule per 2 magazines. Of course the other advantage is that while a CO2 gun must consume a whole capsule before re-gassing, a conventional gas gun can be topped up whenever you feel like it.
Furthermore CO2 magazines cannot be stored with a live capsule, if there is remaining pressure then it must be vented before storage; a conventional gas gun of course can not only be stored gassed but it's generally a good idea to leave a bit of gas in to preserve the seals making it more convenient, efficient and economical.
Special features on this gun include a slightly longer slide, frame and barrel for theta little bit more accuracy, a textured grip similar to that found on Kbr warriors, and fiber optic sights for a better sight picture in low light environments.

This is not the inferior alternative, merely the more conservative and sustainable one.