grip, and new synthetic stock are made from a black, glass-filled polyamide. The stock is shaped like the RPK-74 fixed stock, but also side-folds like the RPKS-74. The stock additionally has an easier to use release mechanism, replacing the bullet press release from the RPKS and RPKS-74. Each RPK-74M is fitted standard with a side-rail bracket for mounting optics. It also includes most of the 74M economic changes, such as the dimpled on barrel hardware, omission of lightening cuts from the front sight block and piston and stamped gas tube release lever. Updated magazines were produced by Molot with horizontal ribs going up the sides of the magazines. An export variant chambered in 5.56×45mm NATO was also introduced, designated as the RPK-201. Also for export is the RPKM (A.K.A. RPK-203) chambered in 7.62×39mm; it uses the same polymer furniture as the RPK-74M variant. Night versions The RPK family of light machine guns are also available in a night fighting configuration. These weapons are designated as the RPKN, RPKSN, RPK-74N, and RPKS-74N. They have a side rail mounting on the left side of the receiver that accepts a NSP-3, NSPU, or NSPUM night vision sight. Models designated RPKN-1, RPKSN-1, RPK-74N and RPKS-74N can mount the multi-model night vision scope NSPU-3 (1PN51) while RPKN2, RPKSN2, RPK-74N2 and RPKS-74N2 can mount the multi-model night vision scope NSPUM (1PN58). Derivatives RPK-16 The RPK-16 squad automatic weapon (the number 16 indicates the year 2016, when the development first started) is Kalashnikov's response to the "Tokar-2" program, where it competed against Degtyaryov's submission. In 2018, the Ministry of Defence of the Russian Federation have signed a contract concerning the procurement of the RPK-16, and is expected to take over the role of the RPK-74 in the Russian Armed Forces. The RPK-16 is chambered in 5.45×39mm which features the traditional Kalashnikov gas-operated long-stroke piston system, and shares several novel technical and ergonomic features derived from the AK-12 program. Such as a Picatinny rail on the top of the receiver for mounting various optical sights and on the bottom of the handguard to mount the Picatinny rail mounted detachable bipod instead of the fixed bipod of the RPK-74, an ergonomic pistol grip and a folding buttstock, and two main barrel lengths; a long barrel (when it is applied or configured for the light machine gun role) and a short barrel (when it is applied or configured for the