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.
Ammunition, through 30 mm
Possible NAICS Codes
332992 – Small Arms Ammunition Manufacturing
332993 – Ammunition (except Small Arms) Manufacturing
332994 – Small Arms, Ordnance, and Ordnance Accessories Manufacturing