Larue Tactical LT748BLK RISR Cheek Riser Glass Reinforced Polymer Black AR Platform

The RISR is spring-loaded, and travels to the rear as the charging handle is moved to the rear. When the charging handle is released, the RISR snaps forward. Designed to fit the excellent Magpul CTR butt stock without modification, the RISR only takes a few minutes to install with a phillips-head screwdriver.