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Austin, specs here....... Gas piston System, 7.62x39mm Soviet, 12.25" 4150 Chrome-moly Steel Barrel, 30 Round Magazine, Standard Double Stacked AK-47 Magazines, S7 Steel Bolt Carrier, Carburized 4140 Steel Bolt, S7 Steel Feed Ramp, Machined S7 Tool Steel Plate Front Trunnion, 1/16" Stamped Steel, Standard AK Style Sights, Muzzle Device, Wood Upper/ Lower Hand Guard, Century Arms RAK-1 Trigger, US Palm Bakelite Polymer Pistol Grip, Manganese Phosphate Finish, Approximate Overall Length 21.50", Approximate Overall Weight 5.5lbs, Matte Black finish. Hope this helps.

The VSKA rifle features an all new bolt carrier, front trunnion, and feed ramp machined from S7 tool steel and specially heat treated for maximum durability. S7 tool steel provides maximum shock resistance and high compression strength while retaining toughness. The VSKA incorporates a front trunnion and bolt that are machined from billet, a carburized 4140 steel bolt, a chrome-moly 4150 barrel, durable manganese-phosphate finish, and RAK-1 Enhanced Trigger Group for an impressive trigger pull. The carburized bolt is case hardened to a higher hardness while maintaining sufficient ductility in the core. This bolt benefits from a lower coefficient of friction in the carburized surface which reduces the potential for galling and plastic deformation. Production of the VSKA was approved when a sample of rifles were each test-fired to 12,000 rounds with zero trunnion failures and headspace remained within SAAMI 7.62x39mm specification for every gun. The "S" in S7 stands for "Shock Resisting"

Austin, the VSKA incorporates a front trunnion and bolt that are machined from billet, a carburized 4140 steel bolt, a chrome-moly 4150 barrel, durable manganese-phosphate finish, and RAK-1 Enhanced Trigger Group. Cheers and stay safe!

Austin, Machined S7 Tool Steel Plate Front Trunnion. Have a great day!