I have owned both. I still own the 15-22. I do NOT still own the Umarex/Colt. My experience with the Umarex was such that even though I had an opportunity to buy a Umarex/HK that "looks" and feels better than either the Umarex/Colt or Smith, I passed. I'm trying hard not to say exactly what I think about the Umarex/Colt because I'm a kinder, gentler Steve these days, but I'm hoping you might just be getting the picture...
Steve