It’s a lancer tactical chopped gearbox for hpa to fit the crbn upper I have a speed trigger it’s not tuned fully just takes some time to but it shoots fine I can do a shooting video if needed only issue I had was the gun not shooting because of the fcu button being pressed so I trimmed the button and there’s more space for the battery and the polarstar Jack is lubed trigger is tuned it fires fine now fcu still works im asking 600 shipped with all accessories in photos shown i do have shooting vids available hopup needs a new spring i chopped the nub without realizing I didn’t need to so probably needs a new HopUp to use a spring with it but works with a lil adjustment if u pull it no issues while shooting it tho beams and stuff