DETAILS, FICTION AND REMINGTON 22 MAG AMMO

I want to find a barrel which is for any wingmaster only? What size will get me to unique and therefore are there for a longer time barrels obtainable? To who must I turn Aside from ebay?So I assume the question is, were the extremely early Wingmasters, (say 1 manufactured in March of 1950 ) okay or did Remington have any early output bugs to work