(I understand that this price may seem way too high but this gun is truly a beast, and I’m selling a lot with it) Assembly definitely required. Was a project gun for me and now it can be your project/problem. If you know what to do and can do it, it’s an awesome gun! Every bit and more should be there. The gearbox needs at least a new piston, piston head, and spring guide, but honestly it could go for a whole new everything. Everything this gun needs, you can buy online at Evike and airsoftgi. This price is very generous considering how much I’ve spent in money, time, and stress for this gun. It’s a great shooter once it gets working great dmr. FYI the inner barrel is 509, it’s takes an m14 hopup(it’s got the second best one in there right now) and the gearbox is a version three with a couple tweaks. Lot includes: The aug w/ras rail Gearbox(disassembled) 9 midcaps 1 hicap 2 8.4v batteries 1 9.6v battery Charger And all external parts (There’s also likely going to be a few random bits that don’t belong) Please message me if you have any questions.