no one but glock knows exactly what's causing the issue, and they've never admitted there's a problem with any of their guns. yes, the trigger bar scrapes the slide, but so does it on my G29 non-SF model (and many others), and i've never had an issue.
some think the rear frame rails are set higher in the frame than the front ones, but that's not the case. the frame polymer simply rises up closer to the rear rails. they're the same height.
there's been problems with the SF frame models since they were introduced. the gen4 models are in fact SF frames as well, and they suffer problems, sometimes even with the updated recoil springs. there seems to be something inherently wrong with the SF frame design. the only ones that don't seem to have any issues are the G20/21 SF frames, for some unknown reason.
it does afflict only a minority of models, but it happens enough that i bought the non-SF g29, despite my small hands.
just my personal take on the subject. many have SF/Gen4's and like them.
some think the rear frame rails are set higher in the frame than the front ones, but that's not the case. the frame polymer simply rises up closer to the rear rails. they're the same height.
there's been problems with the SF frame models since they were introduced. the gen4 models are in fact SF frames as well, and they suffer problems, sometimes even with the updated recoil springs. there seems to be something inherently wrong with the SF frame design. the only ones that don't seem to have any issues are the G20/21 SF frames, for some unknown reason.
it does afflict only a minority of models, but it happens enough that i bought the non-SF g29, despite my small hands.
just my personal take on the subject. many have SF/Gen4's and like them.