This is a fully functional, upgraded modify PP-2000 with an Airtac UK HPA adapter. The adapter utilizes MP5 AEG magazines and this comes with 6! Five are the 100rnd cyma metal mids, and one of them is the cyma 130rnd polymer one. They all fit and feed flawlessly in the adapter. For the gun itself, it functions just fine and shoots nicely! I have a shooting video to show it! For upgrades it comes with: a CNC nozzle stopper, maple leaf 150mm tightbore, and a modify 65° predator bucking. I just recently replaced the bolt carrier, and I also fixed the common issue where the trigger gets stuck in semi and you have to push it forward. Again, that is now FIXED. It also comes with a few spare parts, such as a low fps nozzle, spare trigger springs, and a valve for the nozzle. This bad boy is ready to rock!