I just purchased a 1928 parts kit from IMA with the Lyman rear sight, It seems a lot of places are selling the 1928 kit from this big Russian stockpile, who brought all the kits into the US? I have not kept up to date with the Thompson market lately And recently got inspired to get an SBR kahr semi and do some of the mods I have been reading about on this site. With all the Excelent condition parts kits around I figuard it's a good place to start and buy when the parts are available. So dos any one have a clue how many Thompson's the Russians had and how many we got back into the good old US??