the RCMP regarding AIA mags:
"- the magazine design for this rifle, in calibre 7.62MM NATO has been determined to be a purpose built, proprietary design intended for a bolt action rifle (notwithstanding its incidental ability to be inserted into some other designs with varying degrees of success). Although this magazine design is similar to that used on the M14/M1A type rifles, differences, including the absence of a locating hole on the front of the magazine and a different détente on the rear of the magazine are significant enough to distinguish it from a magazine intended for use in any automatic or semi-automatic rifle of known design. This decision only applies to newly manufactured magazines intended for use in bolt action rifles, commonly known as the Lee-Enfield design as produced/supplied by Australian International Arms (AIA). Design characteristics also distinguish these newly manufactured magazines from their original Lee-Enfield counterparts. These new magazines are intended for use with a rimless cartridge (7.62MM NATO) as opposed to the original rimmed 303 BRITISH cartridge (this also precludes its use in the Charleton Automatic Rifle)."