airsoft bomb game

#1

Can someone help me build a c4 for airsoft games

equal to cs of cs go

this is the image

https://www.google.com.br/search?q=c4+cs+go&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjIjaWjms_fAhXGxpAKHc9XBC4Q_AUIDigB&biw=1360&bih=657#imgrc=eTznPS1ah2k1MM:

remembering this c4 fake will be used in airsoft games just to give a tone of realism

Can someone help me