Remington introduced their Nylon 66 autoloader in 1959. In spite of early skepticism about the Nylon (Zytel) stock*, it was very successful with well over a million made. They decided not only to replace their bolt action wood stock line of .22's (510 single shot, 511 box magazine, 512 tubular magazine) with Nylon stock models (10 Nylon, 11 Nylon, 12 Nylon) but to add a lever action (Model 76) and a 5-round box magazine version of the original 66, called the 77. I believe all were offered with stocks in Mohawk Brown (standard), Black Diamond, Apache Black (with chrome metal), and Seneca Green. The Nylon 66 was also made in a .22 short version for the shooting gallery market.
The Apache 77 is the same as the 77, but has a ten-round magazine; it was made for K-Mart 1987-89. The receiver cover is black painted (looks a bit like Parkerizing), the stock is olive green.
None were anywhere near as successful as the Nylon 66 and Remington eventually dropped the whole Nylon stock idea.
*Savage/Stevens had begun using plastic stocks for its shotguns and some .22 rifles a couple of years before and persisted in spite of the fact that the stocks were brittle and the woods were littered with the pieces of broken stocks. So the public needed selling on the Nylon 66. I watched the Remington rep run his station wagon over one, repeatedly, and became a believer.
Jim