Handled one of these at the NRA Annual Convention in Dallas. http://sarsilmaz.com/en/catalog/product/SAR-9/13/114 The booth attendant was kind enough to allow me to field strip the pistol. The slide is very Glockish inside. I'm not going to claim that parts will interchange, but it's more than just somewhat similar--it even has the Glock-style rectangular profile firing pin point and breechface opening. The biggest difference I saw (besides the externally different appearance) is the extractor. The barrel has conventional rifling for those who like that feature. The frame is where the big differences are: 1. It has a grip with replaceable panels. At first glance, it looks very much like an H&K P30 grip. Still does at second and third glances--as many glances as you like and it still looks like an H&K P30 grip. 2. There is an ambidextrous manual safety on the gun--at least on the one I handled. It does appear from the SAR website that the pistol can also be had without a manual safety. 3. The frame parts are contained in a steel "module" which is the serial-numbered item. There's a "window" on the right side of the frame that allows the serial # to show through. I did not attempt to remove the module so I have no idea how easy or hard it is to take it out of the frame. 4. In spite of the module holding all the internal frame parts, the parts themselves will look very familiar to anyone who has experience with Glocks. Again, I'm not going to claim that parts interchange, but it wouldn't surprise me greatly if that turned out to be the case with at least one or two parts. Dimensionally speaking, it's probably closer to a Glock 17 than a Glock 19, however in spite of that, capacity is 15 rounds--at least according to the Sarsimilaz website--other sources list the mag capacity as 17 rounds. It's available in stainless and black finish. I'll be interested to see if people who like the general Glock design but want a manual safety, or a more user-configurable grip end up gravitating to this pistol.