Since T/C (S&W) refuses to add the 450 Bushmaster to its Katahdin Series we've decided to do it ourselves and BETTER! Better because we've used a custom MGM 20" SS barrel, built to a mzldr contour with dovetailed adaptor bushings under the barrel. Simply use a muzzleloader forend and never have to fight with those undersized 8-40 screws bending, breaking or causing your forend to fail again. Priced as pictured with free shipping, no sales tax, sling and twist my arm and I'll throw in a T/C base ring combo for free. OK and I'll ship it in a free soft case too. Marty
Also consider adding a trigger job or maybe the Leupold 450 Bushmaster scope( 176011) , already dialed in for factory loads.