This means that you'll be able to search for NAICS codes directly (if that's your jam). We'll do the math; let's make better data on public procurement together.
Periscopes for Submarines; Range and Height Finders; Telescopic Sights; Optical Instruments Integrated with Fire Control Equipment.
Possible NAICS Codes
333310 – Commercial and Service Industry Machinery Manufacturing
334511 – Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
332999 – All Other Miscellaneous Fabricated Metal Product Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
316990 – Other Leather and Allied Product Manufacturing
336413 – Other Aircraft Parts and Auxiliary Equipment Manufacturing