The REVIC Optics PMR428 4.5-28x56 is the next step in the evolution of riflescopes with features like Bluetooth compatibility, heads up display (HUD), and an on-board ballistics computer. REVIC Optics, a subsidiary of Gunwerks spent five years developing the PMR428 ensuring that it wouldn’t just enter the market as one of the most advanced riflescopes but as one of the most reliable too.