The whole purpose of a carrier barrel is that it is bored out to reduce weight to the point that, with the tube set in place, final weight will be the same, or very, very close to the same weight as the original 12 ga. set. Some responses seem to assume that the weight will not be the same. If it isn't, I'd have no interest. If it can be made to be, and my understanding is that it can, the advantage of the carrier barrel set remains.

SRH

May God bless America and those who defend her.