SureFire's 628LMF-B Forend Weaponlight is the ultimate upgrade to your HK MP5, HK53 or HK94. This dedicated forend replaces the original on your HK platform and produces an extremely powerful 1000-lumen beam of blinding white light for a tactical edge in low-light situations. The 628LMF-B utilizes a heavy-duty LED emitter with a TIR lens to focus the light into a potent beam, optimized for close to mid-range applications. This weaponlight uses two 123A lithium batteries that provides a continuous runtime of 1.25 hours. It has two modes: momentary and continuous. The momentary mode activates the light for as long as the pressure pad switch is held down. The continuous function is activated by pressing the rocker-type switch on the left side and will remain on until switched off. Features of the SureFire 628LMF-B Forend WeaponlightMomentary aviation pressure padConstant activation rocker-switch1.25 hour battery life1000 lumen output SureFire Dedicated Forend 1000 LU WeaponLight for MP5/HK53/HK94 628LMF-B