Not realistic per se, but close enough for TPT standards. The mechnism is really nice. The use of tungsten wires is quite unfortunate as it eventually fries the circuit. It's not a hard fix, so probably you want to check that out...
it's a very unusual to have tungsten as a wire, basically it melt all the electronics
failing after some time, even if i don't do anything
its not realistic but cool +1
sapient-primum: last time i checked bb guns didnt have a shell incinerator inside of them
the mechanism is cool though +1