CSS (Connecticut Spring & Stamping) manufactures precision progressive die and fine blanked stampings, specializing in tight tolerance components for firearms and weapon systems. We make and stock parts for the AR platform too. The industry also relies on CSS for precision custom springs, including shaped and stranded wire. CSS is ISO9001-certified with 450 employees and 200,000 sq ft of manufacturing space. Products include magazine assemblies, slide stops, trigger bars, ejectors, struts, recoil springs, magazine springs, and compression-extension-torsion springs. Est. 1939. (less)