I downloaded the following mods:

Vertical Grip Attachment Pack: https://modworkshop.net/mydownloads.php?action=view_down&did=22593

LMG Steelsights: https://modworkshop.net/mydownloads.php?action=view_down&did=1531

The only things I have seen glitched out so far between these mods are any weapons in the G3 or AK families in the Assault Rifle category. I can confirm the Sagia 12K in the Shotguns doesn't do this and there might be more weapons that do this in other categories but I haven't discovered them yet. What happens is that when I aim down sights with any Vertical Grip from the mod on any AK Rifle or G3 Rifle the gun does the vanilla LMG aim (gun is to the side and the screen zooms in slightly) but it also is inverted (the gun is on the left side of the screen). Is there a workaround to this? I will list the following weapons that do this:

Ihzmah AKS-74 (AK Rifle)
G3A3 (Geweher 3 Rifle)
AK 12 (AK-17)
Ihzmah AKMSU (Krinkov Submachine Gun)
IMI Galil ARM (Falcon Rifle)

EDIT: Turns out that any weapon that is similar to the RPK or the HK21 (like the G3) will have this glitch as the AKMSU has this as well.

EDIT 2: AK 7.62 Rifles actually don't bug out. I assumed they would since there in the AK family but after testing them they don't bug.

There may be more possibly but these are the ones I have discovered to have this glitch. Does anyone have any ideas? It's quite annoying to have this happen.