Marlin / Glenfield Model 60 Barrel Picatinny Rail Adapter

ok so im bringing some new life into my old Model 60 by Marlin. Anytime you upgrade a rifle there has to be rails right!! so with zero options i could buy for it i designed a Rail system for it.i Have included 4 Designs, one is just the Bottom rail and the sides and top are smooth, One is same as first but has a 12mm cut out in the top to allow the original Iron sights to be used. The 3rd is a Tri-Rail design leaving on the top without rail. The 4th is same as 3rd just with the same sight channe