- It HAS standby iron sights.
- It HAS a bayonet lug.
- The flash supressor is an M-16-style "birdcage", vice the "pronged" model on the prototypes.
The mags also snap together, and in the firing sequences, Ermey worked it on F/A with no discernable muzzle rise.
In all, it was a good showing of the weapon, with an Army LTC doing the demo for Ermey.
The "modular" feature was also demonstrated, with the forend being removed in a thrice.