The Desert Tech SRS A2 Covert Chassis with Monopod. The new A2 chassis system features the same ergonomic bullpup design as the A1 but with features designed to make the SRS A2 (SRS A2 Covert) chassis system more accurate, lightweight, and reliable. The SRS A2 chassis will be available in the more compact SRS A2 Covert model as well for additional maneuverability and weight reduction.