Hotfix for V1034.2

This hotfix addresses some issues with yesterday's V1034.2 patch that slipped through testing.

• Fixed bug that prevented re-equipping primary weapons in certain circumstances (e.g. when picking up laptop in Intel Retrieval)
  
• Fixed issues related to front sight post on M17 pistol
  
• Fixed various bugs with zeroing sights and some more iron sights not being handled properly
  
• Fixed missing weapon reload audio on The Farm
• Fixed audio diffraction and occlusion not working in some contexts