I recently installed the SuperBLT update that caused the game to not start late last year. However when I booted up my game, checked on my weapons, i saw that they would not load in the inventory. Clicking on them caused my game to freeze. Rebooting the game, most of the modded weapons disappeared and I was refunded their cost. It also extended to base game weapons with custom attachments mounted on them (i.e., CAR-4 with AR-15 custom attachments mod)

The game still detects them in my mod list, but the guns would not show up at all in BeardLib and my inventory.