I'd be interested in this... if my only use for 12 grams WASN'T a TPX
I'm curious to know why crap4 even bothered going out of their way to design/make this. Do they work in T8/T9 pistol mags? I could see the refillable option being a huge plus if you have air-in-mag like those use. Also, are these Co2 only? Why would you even bother these days?! HPA is free with a compressor and is better for the environment so I'm not sure why there'd be any demand for technical advancements in Co2 these days.