The VSKA has been reengineered with critical components using machined S7 tool steel a material so highly regarded for its ability to withstand heavy duty action. It features an all new bolt carrier front trunnion and feed ramp machined from S7 tool steel and specially heat treated for maximum durability. S7 often referred to as a ShockResisting Tool Steel is commonly used for tools like chisels and jackhammer tips as it has maximum shock resistance and high compression strength while retaining toughness. The front trunnion and bolt are machined from billet and exceeded the durability goals for the project. Additionally the VSKA features a carburized 4140 steel bolt a chromemoly 4150 barrel and sports the RAK1 Enhanced Trigger Group for an impressive trigger pull.