I've shot a friends PTR HK Clone. It's nice. Lots of fun to shoot with a binary, supressed. He loads subsonic for it.The PTR HK clones that I've handled seemed to be pretty well made. Not far off the actual HK stuff I was lucky enough to be able to shoot in the 1980's and 1990's (and in the 2000's at the old job), and 1000X better than the century arms garbage from the 1990's.