The offer for airsoft grenade is very wide, from the Zoxna have, the Tornado, the Thunder-B or Kimera Jr. what would you think about  making your own homemade grenades?

Before anyone says anything (which I already see it coming) its a simple mechanical system that needs no pyrotechnics. Obviously it will not give a high performance as that of the other market grenades. but this invention by crazyPT is really curious, look: