LaserMax Laser Sight for Glock 20 21 FG/R

LaserMax internal laser sight for Glock 20 21 w/Finger Groove RailLaserMax designs and manufactures the world's only totally internal laser sight.Installation Takes 5 Minutes If you can field-strip your gun you can install your LaserMax sight - no gunsmithing required! Almost instantly you'll have a laser-sighted weapon which can be used outdoors from dusk till dawn or indoors round-the-clock.The Only NATO Approved Laser Sight for HandgunsLaw enforcement departments and military organizations around the world including the North Atlantic Treaty Organization (NATO) specify LaserMax for their personnel.Highly Visible Highly IntimidatingOnce you place that intimidating red dot pulling the trigger may never even be necessary. If you must fire the LaserMax improves aiming speed and increases accuracy especially in high-stress situations.FEATURESTotally internal - cannot be knocked out of alignmentNo permanent modification to gun - remove it anytimeNo need to change holster or give up your rail flashlightCompatible with your favorite grips and aftermarket accessoriesDrops into place replaces original recoil spring guideAmbidextrous switch in custom take-down leverDeliberate on/off activation - no squeezing the grip no shakingPulsating beam for increased visibilityFactory aligned (1911 models are also user adjustable for fine tuning)Quality assurance includes live test firingMade in U.S.A.Three-year warranty (excludes expendable parts).FAQ'sWhat is LaserMax?LaserMax is the most rugged and reliable laser sight on the market. It is the only totally internal Laser gun sight available today!What does it fit?All GLOCKs SiG "P" series full size Berettas 1911 Govt. and moreCan I install it?Yes! Our sight replaces the recoil system requiring basic field stripping and reassembly.Any effect on the warranty of my gun?None. No gunsmithing or modifications to the gun are needed.How do I turn it on?All sights have the switch located in the frame where the slide lock/release lever is.Why do I want it there?It can be activated with your finger outside of the trigger guard. If you have received firearms safety training you'll know that this is where your trigger finger goes while aiming. Other locations or activation methods can invite accidental discharges of the firearm or magazine drops.What if I am left-handed?All our sights are ambidextrous.Why do I want a pulsating beam?Faster sight acquisition especially in your peripheral vision.Is it dependable?Our sight is very rugged reliable made to LE specs and is NATO approved for the military.What is the power source?Silver-oxide watch batteries available worldwide. Most customers change them once a year