Laserlyte Rear Laser Sight Ruger SR9's RLSR 

Laserlyte Rear Laser Sights -  Fits Ruger SR9s - RLSR

The Rear Sight Laser (RSL) – A ground-breaking laser design incorporated into the rear sight. Compact size and revolutionary performance make the new RSL the most extraordinary system LaserLyte has ever produced. Easy-to-install and easy-to-operate, the new RSL offers a high-power laser with the benefit of not having to replace existing grips, internal stock parts or holsters.

The activation switch is a strategically placed button at the back of the slide that is easily activated by the thumb in a normal shooting position for left- or right-handed shooters. First press of the activation switch produces the constant on mode, second press produces pulse mode, and third press deactivates the laser. A small LED on the back of the laser indicates if the laser is on and what mode it is in.

The RSL fits all Ruger SR9 and SR9 Compact pistols and is constructed from MIM 4650, nickel enriched high carbon steel, the same material used for most heavy-duty gun parts such as iron sights, hammers and levers. It is also black oxide, bead blasted for a non-reflective finish. When mounted onto the pistol the RSL will fit all Level 1 and 2 holsters. Powered by four 377 batteries, commonly used in watches, that provide one hour of run time on constant on and two hours in pulse mode.

Specifications:

- Compatible Firearms: Fits all Ruger SR9 and SR9 Compact pistols
- Power Output: Class IIIA, 5mw
- Laser module: 650nm
- Batteries: 4 x 377
- Battery Life: Normal Usage - constant on: 5 hours +, pulse mode: 10 hours +
- Weight: 1.2 oz., 34.02 g
- Length: .85 in., 21.59 mm
- Width: 1.05 in., 26.67 mm
- Height: .35 in., 8.89 mm
- Range at Night: 500 yd., 457.2 m