The MDRX SE (Micro Dynamic Rifle Xtreme Side Ejection) is designed for maximum concealment and ambidexterity, allowing operators to return fire at any angle without exposing unnecessary parts of their body to threats. It features upgraded polymer resin to better withstand high impact falls, and improved gas block drainage to ensure maximum reliable performance in water and mud submersion testing. The trigger pull and creep have been reduced to allow for more accurate shooting capability. The side ejection can be converted from left to right hand ejection by removing the Allen screw and flipping the bolt head 180 degrees in the bolt carrier. The MDRX-SE can be converted to a forward ejection rifle by purchasing an MDRX conversion kit and forward ejection kit. (not included)