Simple: An antigua that maintains it's pierce ability. As it goes through upgrades, it becomes more... Well, sharp.
4* - Grandaevis
"An ancient handgun that fires small drills as bullets. Probably wielded by a hot-headed knight."
It's the same as the blackhawk/silversix, in all but damage and charge attack. It does piercing damage, clearly. The charge attack is instead quite different. instead of firing 5 normal shots and a 6th, more powerful one, it instead skips straight to the more powerful shot. The powerful shot is literally a flying drill. It can hit enemies multiple times, as it literally pierces through them (Think righteous bison in tf2).
In terms of looks, it's pastel red/orange, and has a straight, jaggedy fin on top.
5* - Caelestis
"A powerful handgun that fires drills as bullets. The side has "Pierce the heavens" engraved on it. Once wielded by a manly knight, is now favored among louder knights."
Same as before, but the drill is a lot bigger, glows, and can hit a lot more times on a single enemy. The bullets also have a spiral trail behind them.
In terms of design, it gets the second bottom fin like the other guns, and it's full on red now. Also, the barrel will have some kind of engraving on it. Giant robots not included.
Has been suggested before.
Antigua that has pierce? Has already been suggested before.