I gotta relate this since one of my family was with Val Browning in 1918. Val being John's son.

Val Browning would take the BARs and write detailed journals on what happened with them. What was good, bad, what broke, jammed, how many rounds they fired at target or in combat. He'd send the journals back to to father John Moses Browning who would tweak the next shipment of BARs and send it out. This happened a few times until Armistace.
I don't know of any other instance in a war where the designer gets updates from his son in the battlefield and sends out improved guns.


























