Discussion Starter · #1 ·
I was comparing HK pistols in the store the other day, and they were kind enough to let be do a pretty detailed disassembly/inspection. The biggest difference I saw was the longer, double recoil assembly on the USP full size, and the single spring with buffer on the Compact and all other guns (as well as some slide rail changes). Why did HK not adapt the original RSA to all the other models. Supposedly this this was at the heart of the USPs exceptional recoil impulse, longevity (I understand one is at 297K+ rounds), and allowed to easily hand really hot +P+ 9mm and .45 (and even .45 super) out of the box with no damage. I can kind of understand why its missing from the subcompacts, etc, due to size (though I would think HK engineers could have made it work), but I'm at a loss for the full sizes, especially HK45. I am curious as to whether this is an actually engineering issue, or simply financial/marketing.