Strike Industries Charging Handle Designed For Glock Rear Sight Mount GSR Black One Size. The SI GSR is a tactical light weight ultra sturdy inexpensive solution for shooters wanting to add a rear sight to their GLOCK but dont want to have to spend a huge sum of money to have one customized installed. It comes with a rail to mount any sight of your choice screws to adjust height and a back plate (Back Plate Locking System) to secure the rail and eliminate any movement from vibration. And if you choose to not use an optic the rail has reference dots you can paint so you dont have to remove the rail. For the competitive shooter the rail is also compatible w/ a separately sold ambidextrous charging handle. Strike is always striving to create innovative solutions to push the envelope and give the user what they want with the most available options possible and they feel that the SI GSR is exactly that kind of solution Specifications for Strike Industries Charging Handle Designed For Glock Rear Sight Rail Adapter: Manufacturer: Strike Industries Color: Black Fabric/Material: Aluminum Gun Make: Glock Features of Strike Industries Charging Handle Designed For Glock Rear Sight Rail Adapter Affordable alternative to mount rear sight/red dot on compatible GLOCK Aluminum Picatinny rail weighted at only 1 oz. Back plate with screw for added security Backup rear reference sights Compatible w/ ambidextrous charging handle Package Contents: Strike Industries Charging Handle Designed For Glock Rear Sight Rail Adapter Strike Industries SI-GSR-CH: Charging Handle Designed For Glock Rear Sight Mount GSR Black One Size