Built on a GHK Mk18 Mod 1 base. In great shape and works as intended. Roughly 500rd fired. It retains OEM charging handle, bolt carrier, trigger, and handguard. Upgrades include- Holosun Aimpoint T2 clone, Geissele Maritime bolt release clone, LWRCI CQB stock, milspec buffer tube, spring and H3 buffer, and castle nut with QD end plate. Magpul grip, ambi safety, high output CO2 bolt for increased FPS, TNT APS-X hop up system with 10" barrel, concealed by a mock K length suppressor. Comes with 4 GHK CO2 mags.