For : Glock 20, 21 Finger Groove Rail And 21 Sf (will Not Fit The New Inventorytyp : Reg Vendor Group : Lmi Product Description Description: Internal Laser Sight 635mm high brightness sight. Totally internal, cannot be knocked out of alignment. No permanent modification to gun. Easy installation. Drops into place. No need to change holster. Compatible with your favorite grips. Ambidextrous switch in custom takedown lever. Deliberate on/off switch. Pulsating beam. Factory aligned. Additional Information: 635nm Laser Sight Glock 20/21 Models with Finger Groves and Rail Manufacturer: Laser Max Item#: ACU-LMS-1151PFGR Low Stock $355.99 Quantity Prices for internet orders only. Not all products available in store. Overall Customer Rating:  Rate This Item   |  Write a Review Related Items HOLOgraphic Weapon Sight with Night Vision Model 553 SU-231/PEQ $746.99 Trophy Red Dot Sight 1x28mm 6 MOA Red Dot Matte $71.99 ACOG 3.5x35 Scope Illuminated Amber Crosshair .308 Ballistic Ret $1,257.99 Master Series Lasergrips For 1911 Government/Commander G10 Green $351.99 Walther PS 55 Red Dot Point Sight For Air Pistols $82.99 Uni-Max Momentary Activation Switch Six Inch $52.99