Deployable beartraps, in that you can emplace them, and they cripple the leg of your enemy, without alerting the world via HE detonation
Frag grenade + tin can + some string + a railway spike = trip grenade. Less powerful than other mines, but cheaper
Claymore type directional mine. Very powerful, but only in a certain arc
Dynamite + tin can + scrap metal = improvised frag grenade. Cheaper
Though "just" a deployable beartrap would more than suffice.
Thoughts?
