The exit route to the Agroprom Research Institute is crawling with bandits, but you can try to sneak past them or just run for it. IIRC approaching the exit from northeast is relatively easy. Try drawing their attention to one direction, running around the hangar, and approaching from another direction.

If you've done Agroprom, getting to the Bar area should be relatively easy and you'll have no shortage of decent weapons or armour after that.