Not exactly true on the links.....the exemption says that the belts, of either metallic or non-metallic type, must not be reproduction and made for a gun in production prior to 1945. So a link made in 1950 for a M1919A4 is fine, as the gun was in production prior to 45 and the links are original. Where the problem comes in is the NATO links......they were designed for the M-60, which is a post war gun. Later the Cdn M1919 (C1 or C5A1) were adapted to take that link, but the origin of the link is for a post 1945 gun, so they would be limited to 5 rounds.
The automatic Enfield you are thinking of is the Charlton, and it was because of that gun that they exempted the Enfield mags to 10 rounds. Not really necessary since the Enfields are a bolt action magazine, and therefore already exempt. Doubtful that a special run of magazines were made for the Charlton.
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