See cause number one in the link below.
The avg grunt is probably ok, but the more elite level units fire shit tons of ammo in training.
Paint peeling around a window frame
Lead is a naturally occurring metal that has been used in the production of batteries, metal products such as solder and pipes, devices to shield X-rays, explosives, artillery, ammunition, and more.
Because of health concerns, lead use has decreased dramatically in gasoline, ammunition, paints, ceramics, caulking, and pipe solder over the past decades.
If you have health concerns about lead exposure during service, talk to your health care provider or contact your local VA Environmental Health Coordinator to help you get more information from a health care provider.
How Veterans may have been exposed to lead
Veterans may be at risk for elevated lead levels if they:
Spent many days at indoor firing ranges, such as in a special operations unit
Had contact with lead-based paints that were deteriorating
Drank water from old lead pipes
Had contact with lead in the air, dust, soil, water, and some commercial products