I am looking to place it on a Moss 500 for HD...

Weapons Light System Compact (WLSC - 1000)
An inexpensive, easy to mount, light system.
The WLS (Weapons Light System Compact) is designed for those who want an inexpensive and lightweight tactical light system for mounting on a rifle or shotgun. Features Flashlight with remote end-cap pressure switch and comes complete with precision made mounts to fit 22 caliber up to 12 gauge.
Weapons Light System-Complete with Light, Pressure Switch, Mounting Brackets and Batteries
WEIGHT:
10 oz
Price Part # $42.00 1081034

Weapons Light System Compact (WLSC - 1000)
An inexpensive, easy to mount, light system.
The WLS (Weapons Light System Compact) is designed for those who want an inexpensive and lightweight tactical light system for mounting on a rifle or shotgun. Features Flashlight with remote end-cap pressure switch and comes complete with precision made mounts to fit 22 caliber up to 12 gauge.
Weapons Light System-Complete with Light, Pressure Switch, Mounting Brackets and Batteries
WEIGHT:
10 oz
Price Part # $42.00 1081034

-- Rifle, Pistol, Shotgun
), I've been really happy with the Streamlight Polytac LED lights (that recommendation is about the only thing I could recommend from CDM Gear BTW). They use the CR123 lights, but for how little you will actually use the mounted light, each set will last you a very long time.
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