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.
Guns, over 30 mm up to 75 mm
Breech Mechanisms; Mounts Grenade Launchers for Integral-Cartridge Grenades, Single-Shot or Auto-Loading or Automatic-Firing.
Possible NAICS Codes
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing
332710 – Machine Shops
334412 – Bare Printed Circuit Board Manufacturing
332992 – Small Arms Ammunition Manufacturing
339993 – Fastener, Button, Needle, and Pin Manufacturing
333515 – Cutting Tool and Machine Tool Accessory Manufacturing
541330 – Engineering Services
335999 – All Other Miscellaneous Electrical Equipment and Component Manufacturing