Ok here is the gist of it… you want a unit that can “target” another unit for removal? This is the domain of either armor units ( tank destroyers, SPA, or even heavy artillery)
Infantry would only have it in terms of a commando or special forces unit that goes in and takes out an installation or special tech unit. Use my rule for SPA or allow a unit like a commando unit to choose what it hits if it rolls a one.
Forgot to mention this will be in my D12 games so the hit on a 1 will work.
Elite Guard Inf, SS Inf, Bravo Inf or Black Shirt Inf, Veteran Inf, Commando, and a Marine, A3FR A2 D4 M1 C4 A roll of a 1 can pick target first round only. Can build 1 per turn only.
I think 2 a turn may be to strong. I can put a token under a inf piece or stack showing how many get the special shot if you can build 2 a turn but only 1 gets the special shot.