Thought I would post an update also as this thread has taken off. Spoke with Glock this morning and asked directly if aftermarket sights would have any effect on the 44, the answer was no, go ahead. Installed a set of AmeriGlo sights with fiber optic front post. Then lightly applied some oil on all contact points. Then off to the range and fired 200 rds of CCI Mini Mags. I had zero issues with any first round failing to feed properly. The gun also ran flawlessly for the entire time with no hiccups at all. Overall impression was 100% favorable with no reliability issues.