Reaper,
My hearing ihas gotten to the point where I hear constant crickets which puts me at a distinct disadvantage. Remember telling all the troopies when we went out in the DMZ in Korea for nightly ambushes that when the crickets stopped chirping the fun was about to start. Now I guess anyone could creep up on me if I were to rely just on that cause I always hear the damn things. Crickets in winter are especially weird.
Did the same thing with the hearing protection but too many door breaches and associated use of flashbangs sort of negated that.
Had some experience with .50 cals made under contract for selected mission profiles . As I recall the price tag for some of these systems including the optics were well over the 5K mark and them some when you started adding additional widgits. The primary ammo was the ROLFUS .50cal, but had some other ammo also. That stuff carried a hefty price tag also so consequently we trained mostly with issue .50cal AP ammo. Sounds like you got a good deal on both the system and the ammo.