In the movie MacGruber, Will Forte wears Ray-Ban 3025 Aviator sunglasses. He actually sports several Aviator type sunglasses, but it's not 100% sure that they are all Ray-Bans. Some of the frames are silver and at least one pair has the gold (arista) color.
What can be noticed is the special leather side protectors that MacGruber sports on his sunglasses. One black (or brown) and one white version can be seen in the trailer. These side shields would have to be bought separately for the Ray-Ban Aviators. A brand that has these shields is Julbo, in their Vermont and Micropore range (see here)
The Ray-Ban 3025 are available in many frame and lens colours, including Polarized lenses (which are more expensive but provide better protection for your eyes). See store list below for online deals.
In a promotion that runs until May 31st, you can win polarized Ray-Ban Aviators on the MacGruber film website.
Reference: Ray-Ban RB 3025 Aviator