The LG-457 Laserguard® is a powerful red laser sight designed specifically for Smith & Wesson® SD and SD VE pistols in 9mm and .40 S&W. Featuring Crimson Trace's famed Instinctive Activation™, the laser sight springs to life with a normal hold on the pistol. The LG-457 is user-installed in moments with zero modifications to the firearm, and is completely adjustable for both windage and elevation. The Laserguard offers four (4) hours of run-time with supplied battery and is eligible for our "Free Batteries For Life" program.