I noticed that sometimes when i equip the assault scope the red lines inside the scope don't appear. It will just show the scope with a blank inside. Has anyone else had this problem?

This svcks it happens with me with both assault and sniper scopes...
most commonly apears at wall street in the broken front where the emerging spore is located (left part...)

This svcks it happens with me with both assault and sniper scopes...
Yeah I've had problems with sniper scopes as well. I'm hoping they will fix this glitch soon because it really annoys me.

Never happened to me...

But what if you just unscope and re-scope? Switch weapons?

It has happened only once to me that I can recall, and it was caused by some severe lag if I remember correctly.