How about just removing the mags?
Yes I know the mags aren't detachable in the normal sense, but they do come off. (out?)
Deliver the shooter-grade rifles without mags. then have the mags pinned here, there, wherever, and have them delivered at a later date. This probably won't work for the matched-number rifles because of the logistics of keeping all the numbers straight and getting the right mag delivered to the right person.
Yes I know the mags aren't detachable in the normal sense, but they do come off. (out?)
Deliver the shooter-grade rifles without mags. then have the mags pinned here, there, wherever, and have them delivered at a later date. This probably won't work for the matched-number rifles because of the logistics of keeping all the numbers straight and getting the right mag delivered to the right person.