Rig a landmine with a suicide trigger and a killswitch mechanism to turn them from stationary traps to ranged explosives. Flat circular body means extra throwing distance.
The function is virtually identical to the acid bomb, save for the possibility of exploding when put in one’s inventory (when they aren’t holding down the correct button). Activate to arm the suicide trigger, which you presumably hold down. Upon release, the mine waits a very short time before arming itself as a regular landmine, which then explodes upon being sufficiently jostled or otherwise tripped. The killswitch allows you to re-activate it and safely disarm the device, so you don’t accidentally kill yourself when you try to put it in your bag, or be forced to throw it and waste your valuable explosive.
Sufficient skill is required to rig these things, of course. No one wants to blow their arm off because they didn’t wire the suicide trigger correctly.
Enjoy playing the most lethal game of frisbee with your local deceased wildlife.