Isn't That Gun the one that Decker uses in "Blade Runner"?

Yep, whole model is same except it has one trigger instead of two. It used to be called .223 pistol in F1 and F2 (where you'd typically want Sulik to shoot 5 times a turn with it and where it'd be a perfect sidearm sharing ammo with Sniper and Bozar) but everyone forgot its name so they just named it "That Gun".

I thought everyone is supposed to know that.