I have a model 58 Topper. Will a barrel from a model 158 Topper fit on it? Outwardly at least the two look near identical. I'm in contact with someone online who has 3 barrels they are looking to sell. A 20 Gauge, 22 REM JET & 30-30. Now personally I'm only really interested in the 30-30 but he wants to sell them as a set & won't split them up. Whether or not I make an offer & how high I bargain with him will depend entirely upon whether the barrels actually fit my Model 58.