About 20 yrs ago, a company made some 2/3 scale (.22 cal) replicas of the M1919 aircooled and M1917 watercooled.
I came with two plastic 'belts' that could hold 1 or 2 hundred rounds.
They had semi and full auto versions and because of the shorter barrel, it was classed as a pistol.
Looked like great fun but was 1,200 in 1980 dollars.