I'm at a point in the game in chapter 6 where it looks like the only way to get past the necromasher-type-head-butters is to set mines for them. The mines are collected at the bottom of the stairs as and need to be planted in order to get the bad guys to stroll over them. Fine I get that. but WHERE do I get the gun/device to lay the maines?
I think I must've passed it by or not bought it at the store.