Hi Taesung,
Actually, there's nothing dumb in the question. In fact, paratrooper's TOE did NOT contemplate the BAR, that is, it was no regulation equipment for Normandy (or other early campaigns). Apparently this is due to the weapon not being considered appropriate for the jump - there were'nt even purpose-designed airborne individual weapon bags for it, as were for other weapons.
But, the BAR
was carried into action in Normandy anyway, it would seem extra-officially, by individuals who managed to somehow handle the jump with the weapon, dissasembled or not.
I have seen this question discussed at Mark Bando's excellent 101 Airborne website:
http://www.101airborneww2.com/
I suppose you can do a search in their forum for it. I remember perfectly I read this there.
The BAR was not common until later operations, when it would be included in the TOE, also. But, although not common nor regulated, there were some to be seen at Normandy too.
Regards,
Dani