The FN FAL is a rare assault rifle that does a large amount of damage. It is only available from helicopter crash sites, along with its variant fitted with a night vision scope, the FN FAL AN/PVS-4.
It uses a FN FAL Mag. loaded with 20 7.62x51mm NATO rounds, the same ammunition used by the DMR, M24, M14 AIM, Mk 48 Mod 0, and M240. Despite this, none of these magazines can be converted for use in the FN FAL, or vice versa. In other words, the FN FAL and the FN FAL AN/PVS-4 require FN FAL Mag. to be used, without any alternatives.