RE with a BAR can suppress a squad in zero cover in about 6 seconds (volley fire).
Do you mean to say that BARs and 1919s increase the suppression effects of Volley Fire? Is it affected by squad accuracy, which would mean that Vet 1 REs might be worth using it with? I'll occasionally mess around with Volley Fire if I think it can turn around an engagement by slowing down a charging Strumpio or what have you but I'm almost always underwhelmed by it (because it blows), mostly because of the extra 20% extra received accuracy while its active (if I recall correctly).
Anyway, if thats true a few BAR REs offers up some interesting Volley Fire options for supporting Rifles like they are meant too.