The Project Militia Maverick is a custom Maverick helicopter that is used in Manhunt 2. It is used by The Project to hunt down the player during the episode: Best Friends. It has the same abilities as the Bloodhound and Police Mavericks. To get rid of the fact that there's no pilot, Rockstar blacked out the windows of the helicopter. It is interesting to know that the helicopter is infact not solid thus it can phase through walls, even though it will not follow you into places it can't reach you in (this goes with all 3 helicopters in the game). It also cannot be shot down at all.
The helicopter is exactly the same as the Bloodhound Maverick, except the Bloodhound's variant has the word "Bloodhound" inscripted on the side.