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Case-hardening or carburization is the process of introducing carbon to the surface of a low-carbon iron, or more commonly a low-carbon steel object, in order to harden the surface. Iron which has a carbon content greater than ~0.02% is known as steel .
The AK-108 is a version of the AK-107 chambered in 5.56×45mm NATO, and the AK-109 is a less known and produced version chambered in 7.62×39mm. Like the rest of the AK-100 series , these newer AKs use synthetic materials such as black fiberglass-reinforced polymer for the pistol grip and heat shield .
The most ubiquitous example of the AK milled receiver. The milled lightning cut on the sides is slanted to the barrel axis. Type 4A/B AKM receiver stamped from a smooth 1.0 mm (0.04 in) sheet of steel supported extensively by pins and rivets. It went into production in 1959. Overall, the most-used design in the construction of AK-series rifles.
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Later Kalashnikov started offering the AK-107 / AK-108 / AK-109 (in order 5.45x39, 5.56x45, 7.62x39) models. Externally they are very similar to the AK-100 series (with some minor differences) and are offered in the same calibers. Internally they use a radically different gas system and incorporate the Balanced Automatics Recoil System (BARS).
The influence of the G36 receiver, AK styled gas piston and Mexican recoil delaying system can all be seen in this partial cut away of a first generation FX-05 Xiuhcoatl. On February 1, 2007, representatives of the SEDENA ( Secretaría de la Defensa Nacional ) and Heckler & Koch met in Mexico City to address accusations of patent infringement ...
The AK-101 is a selective fire weapon that can be fired in either semi-automatic or fully automatic mode. The disassembly procedure for the AK-101 is identical to that of the AK-74. The AK-101 has an attachment rail installed on the side of the receiver for mounting scopes and other optical sights, which will accept most types of Russian and ...
The Type 63 (Chinese: 63式7.62mm自动步枪) is a Chinese 7.62×39mm assault rifle.The weapon's overall design was based on the SKS (known in Chinese service as the Type 56 carbine), but with select fire capability and a rotating bolt system adapted from the Type 56 assault rifle, a derivative of the AK-47. [7]