The G4’s Verstility Knows No End!

A simple swap of the upper receiver transforms your G4 into a whole new BEAST!

[youtube http://www.youtube.com/watch?v=xsnVzisoM5o&hl=en_US&fs=1&]

[youtube http://www.youtube.com/watch?v=Lf2HdXEaKlI&hl=en_US&fs=1&]