It looks pretty good.
I was going to mention something about the color of the jungle boots but then remembered that while mine usually looked black and a bit dusty now and then, the figures would have been tromping through all sorts of dirt, water, and clay.
With the M-79, the barrel and other metal parts would have been dark. I don't remember if uors were black or dark grey, similr to our M-16s. The stocks woiuld havve been some shade of brown, although we had a few used by the sector mortor crews that had worn off their p;aint and showed a tan plastic underneath it. The cushion at the end was believe, black, I'm not sure about that part because if we needed a 40mm launcher, we had the M-148 atached to some of our rifles and some M-174 automatic launchers available.