HK Webshop has USP 45 barrels.
Do you not like the TB? I'm sure I'm missing a few things, but a USP 45 "Tactical" is a USP with a threaded barrel, adjustable suppressor height sights, match trigger, and TACTICAL engraved on the slide. Assuming you're not CC'ing it, not sure why you would want a standard barrel on there.
A slip-on rubber grip would be your only option, and it would be fat.
Do you not like the TB? I'm sure I'm missing a few things, but a USP 45 "Tactical" is a USP with a threaded barrel, adjustable suppressor height sights, match trigger, and TACTICAL engraved on the slide. Assuming you're not CC'ing it, not sure why you would want a standard barrel on there.
A slip-on rubber grip would be your only option, and it would be fat.