I have another bug to report. When you have incompatible attachments (for example Kobra and PSO-3), the UI buttons grey out and you have to click a blank box in the sector inventory many times before you can do anything again.

Another thing, sometimes the NADA item appears and if you click a empty box in the area where you apply weapon attachment, the game crashes or hangs. If you constantly click on a empty box in the sector inventory, the NADA disappears.

One more bug to report, applying the rifle sling to an AN-94 crashes the game.