When the USP came out in the early 90s, its recoil reduction system was touted as a key design feature. However, every HK gun released after USPf had a plastic buffer instead of the dual spring setup. I always assumed that they had trouble fitting the dual spring assembly into more compact guns like USPc and P2000, but the upcoming HK45 also has a plastic buffer, despite being even larger than the USP. So this got me thinking - is the USP recoil reduction system all hype, or too expensive to produce (compared to the plastic buffer)? Or is there some other explanation?