they had the B.A.R. but it was late in the gameMy late Gfather was a machine gunner in WW1. He was wounded in France 3 days prior to the Armistice, and carried shrapnel in his leg to the the end of his days. I think he was selected as a MG Gunner because he was rather large for his day - about 6'2", over 200 lb.
Remember, MG tactics were fairly new at that time. MGs were used more as artillery than Anti-personnel weapons. note I'm not saying that MGs weren't used in the AP role, just that more often they were used as a long-distance harassing fire.
They trained on the Colt-Browning M1895. When they got over there, all the 1895s were taken away (more likely the guns never made it there), and they were given that French POS to use - the Chauchat.
He hated it.
The Chauchat was eventually replaced with the Hotchkiss, at least for his unit. He was using the Hotchkiss when he was wounded - at the same time his remaining 2 team members were killed by an artillery airburst.
He said that he used the corpses as further protection - pushing them up on the lip of the position.
He was there, by himself, wounded, for 2 days before being relieved/rescued (he couldn't walk) by his unit.