Molded polymer cheek riser snaps onto Magpul CTR and MOE buttstocks to provide added support and ensure correct eye alignment with open sights or optics for fast target acquisition. Creates a stable platform for accurate, long-range shooting. Three models let you to raise the cheekweld by ¼", ½", or ¾" for a personalized fit. No stock modification required. Designed for non-AR installations of CTR/MOE stocks; if installed on AR-15, stock must be left fully extended to allow operation of charging handle. Mfg: Magpul SPECS: Fiber-filled polymer composite, black. Fits all Magpul CTR and MOE buttstocks.