oh WOW,i drew a gun that looks similar and is also made of brass that works the same and is actually Alphapotato's signature Sidearm(my profile picture has him holding it!)

This is a Tier 1 gun so I got it quickly today in Endless mode on the second level. A portal appeared to Spookyland, and I was afraid because all I had was Jimmy's starter pistol and this one.

Brasstaxx was great for keeping away the Undead Ducans that like to charge at you. I unloaded that, then switched to the Elite Pistol to kill what was left. I think they have knockback resistance, but it was still useful.

It's definitely not good against large fast swarms, like the Maggots though.

Looks sick!