16" barrel, carbine length gas system. Barrel came with an .094" gas port and was over-gassed with corresponding problems, should be .063" so I reduced it with a plug in the front sight base. Pics of the mod in the "Troubleshooting" forum. Bought a couple of FN uppers from someone on AR15.com a couple of years ago. I kinda went hog wild making this thing, using good parts, just had to have a 6.5 Grendel marked AA lower. My 6.5 is my fav!
F/A =Full Auto in Vietnam? That was the norm, the tactic was called "fire superiority" by the Army.
F/A =Full Auto in Vietnam? That was the norm, the tactic was called "fire superiority" by the Army.