In Vietnam, some US and ARVN troops found the 20 round magazine of their M16A1 lacking in capacity. And while 30 round magazines were distributed to some units (particularly SF forces) in the latter stages of the war, and if I recall correctly, were available for purchase in a PX, some chose a different route. AK magazines would be taken from enemy supply dumps or dead, and modified to accept 5.56, as was the M16A1 modified to accept the magazine. I am hoping to start a thread showing pictures and/or examples of these modified M16A1s, as well as any other modification that may be of interest.

I will expand on this thread whenever I get the chance or find something.

Click to enlarge the picture