hi i'm back
got some bugs for you, don't know if you already know about em:
Laser Sight: Sometimes, the accuracy increase will not apply, forcing you to open the upgrades menu and close it, reload the gun, or switch weapons. You may have to do this multiple times.
Pytaek: Buying the sight attachment breaks the weapon and removes it from your inventory. (this was way back when the mod first released, haven't checked since)
Flak Jacket: It USED to protect you against Panzer, but now only Pro protects against Panzer and Goliath. What happened? Was this intentional?