Spuhr's chassis system was designed with adjustability, modularity, stability, and innovation at its core. They feature Spuhr's innovative interface system, allowing any accessories originally designed for the ISMS to be mounted on the chassis. In addition to their high level of customization, Spuhr chassis' can be finely tuned to the user's desired length of pull, and feature a solid construction of precision machined from a solid billet of 7000 series aircraft-grade aluminum.