The RBL12 was available on a heavy frame, and a lightweight 16 ga. frame that has much thinner barrels at the breach. I doubt you will find one under 7 lbs. though. I have a 30" light frame with beavertail, pistol grip, single trigger, and the low vent rib. I would guess its weight around 7 1/2 lbs.

I think a new or used RBL12 like you want is going to be pretty rare. In my estimation, CSM probably did not make more than 100 RBL12's. I could be wrong, but not by much.
JR

Last edited by John Roberts; 06/12/12 12:37 AM.
Be strong, be of good courage.
God bless America, long live the Republic.