Granite State Manufacturing (GSM) is a small business contract manufacturer providing complete in-house capabilities, including machining, US Navy-certified welding, wiring, assembly, and testing. GSM-built equipment is on every US Navy submarine. From prototype to production runs, GSM has the technical depth, program management, and manufacturing expertise to deliver performance-critical solutions. GSM has 5-axis machining up to 33ft long or 82in diameter and welding up to 35,000lbs.