The VK-1 rifle incorporates an innovative low-profile piston system with a patented design that optimizes gas port sizing and piston assembly for superior performance. Its unique cup and spigot design enhances gas seal efficiency, ensuring reliable operation. The rifle also features a staged gas bleed system, enabling consistent performance whether suppressed or unsuppressed, with various factory ammunition types. The reimagined VK-1 Short Stroke Piston System includes a fully-supported 1-piece op rod and a removable gas block, maintaining the footprint and weight of a standard DI AR-15 while leveraging the advantages of a piston-driven system.