I have an AEA Challenger pro in 30 caliber that only ever worked for a couple of shots. And then for some reason it won’t reset the trigger or hold the hammer back when you cycle the side lever. It holds air and everything else is fine about it. It’s basically brand new because I only was able to shoot it a couple of times. I just don’t have time to mess around with it so I’m letting it go for cheap so if you have time to mess with it, it could be pretty cool. The only thing that I don’t have for it is the buttstock. But you could use any AR compatible buffer tuse and stock. Let me know if you’re interested by calling or texting 928-846-0437 $175 includes shipping