Back when AZ was messing around with there NO 6 carbine they converted it to 7.62 a small number for tests they moded a L1A1 mag to fit,it is close but needed work for fit and lock up unfortunely it failed based on the NO 1 receiver long story short if the mag is close it can be made to fit some easier then others.The AIA mags can be used in the M14/M305s but the M14/M305 mags can't be used in the AIA rifles legally but if you can't tell them apart then who knows other then you.

Ex: [For fit] Through homework done mags that could easily be put into use on a NO4 MK1 rifle for 7,62/308 are a 700 10 round,AR10 & any like,maybe a Bren still looking at it,the Indian rifles a easy one [new no1 mk3 receivers] those are the ones that I know of I am sure there could be more.
Same goes for the AIA rifles in 7.62 x 39 it is said that a AK47 mag fits so what I got from this post is that [I stated also for the M14/M305] you can use [If it wasn't prohibited] a AIA mag in a AK47 but you can't use a AK47 mag in a AIA rifle legally. [magazine control at its finest]