The Desert Tech MDR (Micro Dynamic Rifle) is a modular bullpup semi-automatic rifle designed around forward ejection — the MDR ejects spent cases forward out the front of the handguard rather than to the side, making it genuinely ambidextrous without any conversion. The action converts between 5.56, .308, .300 BLK, 7.62x39mm, and 6.5 CM with a barrel and bolt change. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2017, USA Weight: 100 oz Overall length: 26.5" Status: Active Intended use: tactical, precision, sporting