A3 Industries Keltec RDB Rail Riser Carry Handle Black. Machined from 6061 aluminum and finished in black anodizing the riser delivers a rigid lightweight upgrade that integrates seamlessly with the RDB platform. The riser replaces the factory Picatinny rail and raises the optic mounting surface by a full inch improving ergonomics when running modern optics night vision devices or heads-up shooting positions. It mounts using all factory attachment points ensuring a solid repeatable interface without modification to the firearm. Designed with function at the forefront the rail retains the factory charging handle bolt lock-back feature including the quick slap-release preserving the RDBs original manual of arms. All required mounting hardware is included for a straightforward installation. Specifications for A3 Industries Keltec RDB Rail Riser Carry Handle: Manufacturer: A3 Industries Color: Black Package Contents: A3 Industries Keltec RDB Rail Riser Carry Handle A3 Industries RR-100: Keltec RDB Rail Riser Carry Handle Black