Set of 2 Matrix calico Jack M4, Both are functional, but one of them has an issue with the mosfet sometimes disabling the trigger temporarily on semi and inconsistent bursts on auto, but mechanically it fires and loads well. The other one works perfectly fine. Includes 2 batteries, 2 red dot scopes, 2 mags, 2 metal flash hiders and a case. Both guns have stock gearboxes in good condition and shoot around 400 fps. Feel free to send offers.