Heatseeker is an innovative, affordable chassis system for your bolt action rifle, allowing you to easily upgrade a traditional factory rifle stock for improved versatility and a sleek, modern appearance. This 1lb, 3-ounce chassis is machined from billet (solid block) high-strength 6061-T6 aluminum and includes a 10-ounce, 14" handguard cut from a unique extrusion shape exclusive to Sharps Bros. This offering is for the AR magazine fed Ruger American Ranch models (calibers: 223, 300 Blackout, 350 Legend, 6.5 Grendel and 450 Bushmaster). RSR -