The SureFire SCOUT series of lights are the creme de la creme of the weaponlight world, and we have a mix of heads, mounts, and tailcap choices from our used lot of lights that have all been individually tested and checked for any counterfeits (because there are many, many scout light counterfeits on the market!) to the best of our ability.
Going without a mount is a decent budget option if you plan on going with an aftermarket M-LOK, Keymod, or other mounting option.
Below is a chart provided by SureFire that should help familiarize you with the head system for the newest line of SureFire lights - the system has remained relatively unchanged throughout the years but this should give you a rough idea of what to expect.
Condition
All lights, and their associated components have been individually tested, and confirmed to work. Given these are trade-in lights, they may have scratches, cosmetic blemishes, spraypaint, or varying finishes.
All Sales Are Final.