Hey, they are hoarding 5.56 and 7.62x51 ammo. Fiochi.. I have a box of that, which I paid too much for. I wanted it on hand should my AR kit come in. The ammo I ordered is likely to arrive before the kit. The kit is supposedly 12 weeks away (making a total of 18 weeks) while the ammo is promised for about 3 weeks from now, only about 8 weeks after the order.
While the machine gun on the right is not a .50, that big barrel on the left appears to be, although it's hard to tell what weapon it's attached to. Blowing up the picture shows a muzzle device more typical of a .50 "sniper" rifle than of an M2. However the picture on the left of a white pickup clearly shows a large gun, fed from a magazine can, mounted in the bed.