Micro Dynamic Rifle — Desert Tech's original bullpup semi-auto. Forward-ejecting design for ambidextrous use. Replaced by the MDRX. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2017, USA Weight: 192 oz Overall length: 37" Status: Discontinued Intended use: Tactical, Sporting