Greyman comes in Type III Hard Coat Black, and 4 custom earth tone colors specific to the series. The New Charging Handle has smaller wings in size to make it more streamlined to the rifle. With rounded edges to prevent any snagging on gear while incorporating the new texture. This makes for more positive contact and a better grip while operating. The New Handguard features the cross-hatch throughout for a better grip. We've taken the front QD's off, making it a flat front that mounts great with cans. The Build Kit is a 12 piece upgrade kit, that includes New Adjustable Dust Cover. We've also upgraded to a Steel End Plate and Steel Plus Pins for a tighter lock up all around.