gyrene i actually went and looked up the BAR online and it had an effective range to 1,500 yards and a max range of shot fired to 4,500. but the thompson and grease gun were rifled? i didnt know this. and btw i nailed it with the effective range of the M3A1... 100 yards is 300feet man. and i said this without actually returning to sources and looking it back up. so i know more than u think man
LOL...I don't remember you saying 300 feet range on the M3...but I'll give you that one.
the Grease Gun was an SMG... this means it is unrifled and therefore only effective within 100-500 feet give or take... let alone 500 YARDS out 
This is what really prompted my replies:
but it only had an effective range out to 1,500 yards. For a ranged weapon thats only good in my mind.
Aside from the idea that you thought sub machine guns used unrifled barrels...1500 yards effective range for any weapon less than .50 caliber is damn good.

You can look up the specs on the BAR all you want...strange that a semi automatic rifle has a longer maximum effective range than a bolt action of the same caliber and era...and the bolt action rifle is by far more accurate.
Yes you could kill with the BAR out to 1500 if it was in pristine condition and stabilized then fired single shot...but the operative word is "effective range" and that is combat range of 400 yards, except out in the open where the battle could force longer ranges...even though it was capable of full automatic fire, the 20 round magazine and design flaws kept it from being an outstanding infantry squad support weapon...it was considered inadequate for much other than a semi automatic rifle like the M1 Garand...
one more thing gyrene, not to continue an argument here but just a point. fighter vs fighter puts a starting velocity on all ordinance shot from the plane. a BAR or a .30cal mg on the ground COULD damage an aircraft in flight but theres a reason quad .50cals, .20mms, and .37 and .40mms were used. now i think ill drop this conversation because i was wrong once already 

I'll bite...what do you
think those reasons were? This Eric wish is a dead horse anyway.