Designed from scratch using advanced 3D Computer Designs, and constructed from high quality T6 Aluminum, the Madbull M4 Upper and Lower Receiver is an amazing piece of hardware. Fully licensed markings and authentic trademarks sets this series of Madbull Metal Bodies aside from the rest of the industry.
Madbull's metal body feels exceedingly solid, and with the deep CNC engraved trademarks, pushes this upper and lower receiver set to the forefront of the Airsoft industry.
Whats even more exciting is that it comes with a FREE Madbull Ultimate Hop Up Unit (Worth $40)!
Compatible with most Tokyo Marui, Jing Gong, Classic Army, and Echo1 M4 AEGs (Minor modifications may be needed to fully fit the metal body).