Ghost Recon Breakpoint: How to Unlock the 4-AC (Best AR)

The 4-AC is among the best assault rifles in Ghost Recon Breakpoint thanks to its high accuracy, relatively low recoil, and extreme rate of fire. Unlike many other weapons, this carbine's blueprints can only be obtained from Maria's shop in Erehwon (or any Bivouac if you're playing Operation Motherl…