I have been experimenting with an AT build recently and realized that the M1 Carbine and the M49/56 rifle grenades do not zero properly. The M1 doesn't seem to have any zeroing capabilities, and the M49/56 has sites that come up but they do not appear to be accurate at all to the listed zeroes (50/75/100m). Both Rifle Grenades rifles seem to be, in their current state, lob where you think it'll go and hope for the best and then adjust to target from there.

Additionally, when changing the zero on the actual rifle portion of the M49/56, the rifle tilts similar to how the M16 with underbarrel 40mm does when in 40mm mode. This makes the sight aperture block the front site post for 200m and 300m and then you see over the site aperture at 400m. Not sure if that was an intended design of the rifle, or a modeling issue, but I wanted to report it. I absolutely love both rifles after using them, I just hope it's possible to fix the zeroing issues.