They are a good looking replica gun, and I say that as one who was an M60 gunner in the Marines (many moons ago). I am picky about such things, and own two of them. If I had seen them before I bought a dummy from one of the well-known replica makers, I never would have been saddled with that piece of junk. (And if a certain V100 man on here reads this, I'm not talking about the demil I got from you, that one is outstanding!)
They do have a more modern (that is, post-Vietnam era) trigger group, but 99% of folks won't know, or won't care. If someone is bothered by it, let them buy you an original trigger group, which will pop right in.
They lack the forward cradle mount under the barrel, but several of us have found that not difficult to remedy with a little fab work. It is the part, inside that small square hole under the foregrip, that engages the front vertical post of the M142.
They are less rugged than a real gun, or dummy made from real parts, but unless you intend to go some serious off-roading with it in the mount, you shouldn't have any problems.
If you look on this site for Quonsethut's gun truck replica, all his M60's are A&K
Cheers