LOTS OF EXTRAS:
+ Extended Magazine release.
+ Titanium Nitride bolt.
+ Birdcage flash hider.
+ Extended bolt release.
+ MII "Flip up" front and rear sights that co-witness with the red dot sight.
+ Quad rail for light, laser, etc.
+ SUPER-crisp aftermarket trigger; not sure how many lbs, but it's very VERY nice.
Price is firm; priced to move.