I have these factory Third Gen grips, 2 of each type, but know next to nothing about S&W semiautos. I assume the smaller set are for a smaller single stack gun while the larger are for a larger double stack, but that's about all I can figure out. Can anyone tell me what they are? Thanks in advance.

__________________
SWHF #448

Possibly 3913/14 on left and 5906/5/4/3 on right.

Thank you, jsbethel. After studying some photos, I think you're right.

__________________
SWHF #448

Those straight back double-stack grips are kinda hard to find.