When I said Lewis gun I meant the one currently wrongly in the Soviet tree as a premium.
USA-UK needs more variety for LMGs.
At the moment it is literally
Low BR = Bren gun
Higher BR = BAR. Thats it.
Adding the lewis gun at BR III and lowering the M1918BAR (first one) to BR II would mean players have an option for a British OR American gun at both BRs.
We would also get a much needed alternative to top mounted magazines or BAR sights.
I am not against your idea but it would be quite the troll to give Soviets a Lewis gun, the Germans a Lewis gun but not the Allies who actually used them.