Used but in near perfect condition! Includes one extra xenon/halogen bulb assembly, but not batteries.

SureFire M961 Millennium Universal WeaponLight System is nine-volt shock-isolated SureFire system powered by three lithium batteries and providing 125 lumens for one-hour of runtime or 225 lumens for 20 minutes using an optional ultra-high output lamp assembly. Sure-Fire Millennium Universal Weapon Flashlight System M961 attaches to Picatinny Rail interface-equipped shoulder-fired weapons via an included dual thumb screw 

Specifications for Surefire M961 Millennium Universal Systems:

Lumen Output: 125

225 (with optional ultra high-output lamp)

Minutes Runtime: 60

20 (with optional ultra high-output lamp)

Switch Assembly: UM or XM (push button or pressure switch)

Bezel Diameter: 1.62 inches

Mount: Thumbscrew

Batteries: 3 x CR123