Do not hesitate to run a Glock in Open. I couldnt be happier with my decision as I was looking at 2011 and cz as a possible open gun. I went with an open glock 17 using all Carver Custom parts, cmore and angle mount, 4 port comp---tried the sjc, Carver beat it by quite a bit in my opinion and the Carver wont crack, glock parts are cheap and and plentiful and if you like to shoot glocks already and dont have issues with that, you will enjoy it for sure. About a grand worth of parts gets you there with 1 +12 extension. Also mags and extensions have been absolutely reliable. I load all the way out to 1.1615 with Hs6 (usually 1.1550 but wanted to test it) @7.7 grains gives around 171 power factor. Have loaded silhouette as well at 7 gr. Same 171 power factor. Hs6 wins over the 2 but dont mind the silhouette for I may have to use it someday.