The BAR was in service for about 60 years, but the British “Brown Bess” was in service for over 150 years from 1722 on. (.75 caliber flint lock.)
“...but the British Brown Bess was in service for over 150 years...”
Working on that with the .50 “Ma Deuce”...made in 1922 and still going strong.
God Bless John Moses Browning...