My dad laughed about that. He was in one of those units and carried a M2 carbine. There were lots of those, M3A1 grease guns, Thompsons, and M76s. Not one M16 in the unit thoughDrewber claims to humping an M16 in VietNam, I saw a few squids in there, i never saw one with an M16. the landing craft type boats that ran up and down the river from Dong Ha to Da Nang were armed with Thompson SMG's of all things. they jammed alot. a few rusty 1911 pistols completed the in country navy armament i personally saw. the real guns were on the New Jersey, a crusier or two, several destroyers, but the big gal was impressive