The ones we use will most likely be made here.
Anyhow, as an Ordnanceman in the Navy, I can inform you that foreign components are everywhere. British wing pylons, Italian wheels, French sonars. On and on. We build to export and every country that buys them wants a piece of the action. Ain't globalism grand!
Heck, the M1892 Krag was a Norwegian design, the M1903 Springfield was practically a license-built Mauser 98, and elements of the German FG42 were copied (for better or worse) into the M60 GPMG.