I bought a new production USP9T a couple weekends ago from LGS. I ordered the suppressor piston (Obsidian9) with the correct thread pitch as soon as I got home. It took a few days to receive it. Finally shot it last weekend. Man the POI was high by about 5 inches at 7 yards. Very surprised!. 9 out of 10 pistols I have bought were pretty much dead on at that distance, give or take 1/2". I don't recall anything that was off by that much. When I mounted the suppressor, the front sight was actually blocked completely. Gun came with suppressor height night sights. I didn't have any tool with me that day to adjust the rear sight, so only shot a couple mags. The highlight was that the gun suppressed quite well, unlike some of the reports I have read. Went to the range again today and brought along a screwdriver. I almost bottomed out on the elevation adjustment to be able to dial in POI, also the sights now clear the suppressor. Albeit barely. Overall very happy with the purchase. Just surprised by how much the sights were off out of the box. Do they still test fire these? With sights installed?