I acquired a G21 a few months back, having traded in a less-than-100% reliable G30. I've been having a "blast" with the G21. In any event, I gave the gun an armorer detail strip/cleaning, and installed a new recoil spring asembly and OEM extended slide-stop lever. I also purchased two new magazines for it. I took it to my favorite indoor range on Tuesday (Medford Shooting Range, Long Island, NY), and was actually in the middle of shooting when the 5.9 quake hit. The range is underground. Yes, it was cool. Better yet, I blasted through a box of 185gr TTI Armory JHP's and a box of Federal Tactical 230gr. +P HST (100 rounds total). 100% reliability noted. An expensive range day, to be sure, ammo-wise. I'm loving the G21, and not missing the G30.