What you got is a light that's had no detail left out or overlooked. from the head that lines up with the body milling to the machined clip and the forest of tritium slots.*
18650 lithium ion battery (included in the price along with a charger)
Custom Dragon driver.
Samsung LH351d 5000k primary emitters.
Red Blue, Green or Orange(amber) secondaries. 
A glow gasket to match your secondary color
Custom made sapphire lens
1500+ lumen output
 
*Focus Works is working on getting their own tritium license but it will take month's. Once they get it you can send your Cylon back to get tritium installed and a free spa treatment.