A number of you are concerned about the recoil - I feel you misunderstand the nature of this weapon. A trained user can launch the plug at high speed to wound the target, using a specialized liquid propellent. At this point the sabot round is deployed, penetrating any hardening or armor. The CIA called this codename Dying Rhea, after the original name Henry Kissenger was found to be already in use.
I think the more important question is...where is the trigger and how do you prevent accidental firing? I don't want to give away my secret just because I got a little nervous...