Ejector lever, ejector spring, and ejector pin are included for MP5 style guns.
CSM HK Selectors (left selector modified to work with Magpul and maybe SEF style housing)
Shims for Ambi housing (reduce gap between the selector and housing)
Extra Phillips head screws for selectors (stock hex head ones are easy to damage)
Price is firm and $475 picked up in West Plano. Can ship at buyer's expense.