Ive been getting these a lot on the market and I just find the modifier useless, since unless you score a crit it does nothing.
A much more useful modifer would be:
+20% to carapace, or 20% of primary action, which ever is highest.
That way a 286 dmg lasgun would do 57.2 damage against a carapace armored target, instead of 4 as it does now, making it kinda useful against a Crusher.
Right now the standard lasgun is about as useful as the flashlight attached on its side.
I understand that you have to consider the balance.