[the_harbinger]

a friend of mine recently buoght a westernfield 500a shotgun.these are near identical clones to mossbergs.however the barrles are not interchangeable.i can fit my "rolling thunder" style on his reciever but his 28 in full choke will not fit on mine. he wants to make it a slug gun but is worried it wont fit. is this an issue of chamber size?