That one is no longer an airsoft. Unfortunately to fit all the switches in place on the fireselect etc the airsoft mechbox had to be canabalised. The owner didnt mind though as he doesnt play airsoft. You cant really fit the speaker, and everything else in there and keep it a functioning airsoft.
Ive just put a second one together for another friend using a G&P as a base, again not airsoft but it is a lasertag gun so its useable in outdoor combat games we play here anyway.
Its a bit excessive converting the G&P's which was why I was happy that its possible to convert one of Matsuo's kits too.
The electronics themselves cost around £70, adding on for the speaker, muzzle flash and switches etc as well as the built in rechargeable battery knocks the price up another £15 roughly. So around £85 for parts.
Internal layout is battery, circuit and speaker are installed in the spas cage and then the display module which is connected via 4 wires to the main circuit is either mounted on the shroud half (for the G&P) or onto a bracket on the back of the spas cage in the case of the Matsuo conversion. Then theres a few wires going to the switches in the gripframe. On the G&P I used the on/off switch thats already there but on Matts I wired one up to the safety, so that it was turned off when 'safe'.
Like ay project it does take a bit of effort working out how best to mount things but they sure are fun when complete
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