That sounds correct- I believe that the first 2-3 years had that barrel configuration.Early on, I wanna say 1994, 1995. I have a date code 94 USP 40 Cal, it's a spiral rifled barrel versus a polygonal rifled barrel. I assume that's what you meant. I don't know about the newer weapons, I am pretty sure my other two that are newer are poly-rifled. "World of HK" on the front page might have the exact answer.