CRC 5002/9035-RPK is a fixed telescopic butstock for RPK-74:

1 - Weight is only 391 grams. 
2 - Length from 202 mm to 268 mm.
3 - Maximum rise of the cheek pad is 2 cm, and it has a total of 4 positions.
4 - The butt pad is adjustable in height +/- 3 cm.
5 - The design uses aluminum for heavy duty parts and polyamide for the cheek pad.
6 - 90% of the parts are milled from solid aluminum bars.
7 - Coated with Cerakote* ceramic paint

Compatibility:
RPK
Other civilian versions of the RPK-74

Cerakote is an American ceramic gun paint. It is used by leading manufacturers of small arms to coat their products. Chemically resistant. The coating thickness is about 50 microns.