I know only a bit about the M1 Carbine. Have owned one, many years ago, and dearly loved the excellent balance, ease of shouldering, how it fired. My example wasn't all that reliable, but I've loved the platform ever since. Every other time I've had the opportunity to fire an M1 Carbine, it's been a good experience. Am looking to acquire another. I don't particularly care that it's all a matching-SN example. The primary thing is, for me: reliability. Not being even a minor tinkering gunsmith, I don't want to be fumbling with the thing for years in order to get it "right." Got suggestions on which of the vintages were of the best quality, in terms of reliability and general build? Make? Vintage? Variants? Issues to watch out for? Best, most-reliable magazines to use in the things? IBM National Postal Meter Saginaw Rock Ola Quality Underwood Inland Winchester ?