This model features a front activation button. As with all Crimson Trace laser sights, this laser is easily user-installed in moments with zero modification to the firearm. It is factory sighted at 50' but is fully user-adjustable for windage and elevation with provided tool.
The LG-499g features a Master On/Off Switch for completely powering down the unit, if desired. The item "CRIMSON TRACE LG-499G -GREEN Laserguard for H&K VP9/VP40 FULL/COMPACT" is in sale since Thursday, January 31, 2019. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Lights & Lasers".The seller is "tesiebe" and is located in Doylestown, Ohio. This item can be shipped to United States.