I picked up a MK IV stainless Target yesterday, SN WBR1021XX. My local shop had about six Target's and six Hunters, all stainless. I have a few MK I's and MK II's, and a MK III. This MK IV is a really nice pistol. It was the cleanest new Ruger I've ever brought home - initial cleaning found no metal chips, residue, grit, nothing. It was spotless inside and out. The matte finish is nice, but it shows the lightest of scratches (yeah, went there already). The writing is crisp and deep and uniform, really makes a difference in appearance. The "left hand" safety paddle can be removed and replaced with a little spacer that comes with the gun - I hadn't seen that mentioned yet. I did see someone ask if the disassembly button might be inadvertently pushed during use - I don't see how, it is easy to press when you want to, but well out of the way of normal operation. The eagle on the bottom of the magazines is all black, first time I've seen that (my MK III mag has a red eagle). I don't like the flat MK factory grips, I prefer thumb rest, but don't see them available yet. Can't wait to get it to the range, maybe later today. I love my MK II's, but so far this looks like a legitimate design improvement, and the QC may be ratcheted up for the first production run.