Welcome to the proud family of Desert Tech firearm owners. In acquiring your new MDR (Micro Dynamic Rifle), you TABLE OF CONTENTS are the owner of the most versatile autoloading rifle in the world. FIREARM SAFETY........................................................................................................................................................................................................................ 7 SPECIFICATIONS ........................................................................................................................................................................................................................... 9 To get the most out of your MDR rifle, please read this manual from cover to cover before handling and operating the FACTS ABOUT THE MDR ..................................................................................................................................................................................................10 rifle for the first time. RIFLE SETUP.......................................................................................................................................................................................................................................... 11 a) Initial Setup/Conversion Kit Installation.............................................................................................................................................................................................11 CAREFULLY READ ALL OF THE OPERATING INSTRUCTIONS b) Gas Adjustment.........................................................................................................................................................................................................................................14 c) Handguard Installation............................................................................................................................................................................................................................15 d) Ejection System.........................................................................................................................................................................................................................................16 RIFLE OPERATION.......................................................................................................................................................................................................................18 a) Function Check............................................................................................................................................................................................................................................18 b) Loading..........................................................................................................................................................................................................................................................19 c) Chamber Check...........................................................................................................................................................................................................................................20 d) Firing............................................................................................................................................................................................................................................................. 21 e) Reloading.....................................................................................................................................................................................................................................................22 f) Unloading/Clearing.................................................................................................................................................................................................................................. 23 CALIBER CONVERSION / DISASSEMBLY / REASSEMBLY........................................................................................24 a) Conversion Kit Removal...........................................................................................................................................................................................................................24 b) Bolt Head Removal / Bolt Carrier Group Disassembly................................................................................................................................................................26 c) Bolt Head Swap..........................................................................................................................................................................................................................................27 d) Bolt Head Installation / Bolt Carrier Group Reassembly............................................................................................................................................................... 28 e) Magazine Spacer Installation.............................................................................................................................................................................................................. 29 2 f) Magazine Catch Installation................................................................................................................................................................................................................. 29 3 g) Magazine Spacer Removal.............................................................................................................................................................................................................................. 30 PARTS EXPLODED VIEW ..................................................................................................................................................................................................... 57 h) Conversion Kit Installation............................................................................................................................................................................................................................... 31 MDR Main Rifle Assembly................................................................................................................................................................................................................................ 57 Upper Receiver..................................................................................................................................................................................................................................................... 58 DESERT TECH REFLEX OPTIC (DTRO) ................................................................................................................................................................... 34 a) DTRO and DTRO Mount Installation................................................................................................................................................................................................................. 34 Lower Receiver.....................................................................................................................................................................................................................................................59 b) Using and Zeroing the DTRO...............................................................................................................................................................................................................................35 Barrel Assembly..................................................................................................................................................................................................................................................60 Bolt Carrier Group...............................................................................................................................................................................................................................................61 ADVANCED DISASSEMBLY / REASSEMBLY.................................................................................................................................................. 37 Bolt Head...............................................................................................................................................................................................................................................................62 a) Bolt Head Disassembly....................................................................................................................................................................................................................................... 37 Ejection Panel......................................................................................................................................................................................................................................................63 b) Bolt Head Reassembly.....................................................................................................................................................................................................................................