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Here is a pristine and finest example I have ever seen from
The Valley Walker Collection.
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The butt stock is similar to the Russian Club Foot butt stock. It has a nice look.
The front sight is located behind the bi-pod, with some type of fixed muzzle nut in front of the bi pod, and then a Type 87S RPK muzzle break, which is threaded on. These guns have the bayonet lug, although no bayonet could be affixed, with the exceptionally long length of the barrel.
This one was made at factory /416\ just like the most loved Polytech guns.
They all came in with a club foot stock, pistol grip, and blond furniture.
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Thanks for looking. I want to point out that these RPK's were made and shipped to America in 7.62x39 (AK) ammo, as well as in .223 (5.56 Nato).
Here is a nice 87S with original muzzle break, and sporting a 40 round magazine.
I will not make a post of the .223 RPK here, as these guns are seldom seen and come up for sale rarely. Here is a picture of one, so you can identify it by looking at the magazine. That is the straighter .223 magazine above. Can you tell?