1. New barrel. Nuff said.
2. Short activating 3-way valve
3. Hinge trigger if you don't like the standard cocker trigger.
4. REX Nelspot velocity adjuster.
5. General other stuff, air system etc
Well I got a Eclipse Blade cocker with a freak............dont really need alot else for it...........oh no wait......EBlade mmmmmm
*cough*Free plug for planet, I deserve free stuff*cough*