For a 1970s era M-16, I would use mostly blacks, satin for the stock, pistol grip, and handguards, and faded black or very dark gray for the receiver. A dark steel to gun metal for the dust cover, magazines, barrel, and front sight. Any scopes should be flat black.
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM