The LaRue Tactical RISR (Reciprocating Inline Stock Riser) is designed for shooters running optics or elevated rail systems who need additional cheek support for consistent sight alignment. Unlike traditional fixed cheek risers that interfere with charging handle travel the RISR features a spring-loaded reciprocating design that moves rearward with the charging handle and automatically returns forward when released. This innovative system allows you to maintain a comfortable cheek position while still fully operating your rifle—even with the stock collapsed. Constructed from durable glass-reinforced polymer the RISR is lightweight rugged and built to withstand demanding use in the field. Installation is simple and requires only a few minutes using the included hardware. Designed specifically to fit Magpul CTR stocks without modification the RISR provides a reliable solution for shooters seeking improved ergonomics and consistent shooting performance.