The most recent gen (before the new Ambi with pic rail version) has the Armament Tech RMR mount, backup sights, set of clear and blacked out scope caps, the kill flash, and the “empty” kill flash for mounting a cap without a kill flash. The mount is the upgraded adjustable one (original parts...
Lol those dudes sell out in 5 minutes every time they restock. But yeah, if you wanna larp with NVG the original is better, for a PDW this is smaller and has less height over bore so I prefer it