Originally posted by Viking
Yes the Bren Gun was actually heavier than the BAR. However the BAR was built and shaped as an automatic rifle, not as a light machinegun, and its performance suffered for it. The Bren Gun has a pistol grip, a properly centered machinegun stock, carrying handle, and a top loading magazine feed which makes it much faster to reload from a prone position, especially with the aid of a loader. Compared with other weapons of this type the BAR was relatively clumsy and impractical. IMHO of course.
You forgot to add, that the B.A.R. M1918 was
not originally designed to be a Squad Automatic weapon, or a true LMG. It was origanally designed to be an infantryman's standard-issue weapon. The concept was that the infantry, advancing across the no-man's-land of WWI, would be their own fire support, each man capable of wielding' automatic firepower.
During WWII, the B.A.R. had the advantage over other squad automatic weapons, in that one man could operate the B.A.R. You did not need to assign someone out of the squad to be the gun's No.2, thereby you had an extra man freed up for tactical maneuver with the squad. This was viewed as an acceptable trade-off for the 20-round mag.