The mag itself is similar in design to a VSR, so my guess would be it uses a VSR style chamber as well. The bolt handle is obviously an L96 style, so one would assume it to use a L96 style cylinder, also meaning L96 internals. The rest, I can't find pictures of. If you could take pictures of all the internals when you get it, it'd help out immensely, as the internet seems limited on this rifle.
*EDIT*
I stand corrected, it appears the first images I saw were of a WELL L96. It looks as though the AGM uses a VSR G-Spec style handle, which would mean a VSR cylinder and internals.
*EDIT*
I stand corrected, it appears the first images I saw were of a WELL L96. It looks as though the AGM uses a VSR G-Spec style handle, which would mean a VSR cylinder and internals.