I have a GSG-5 that I bought back in 2006ish. Lots of fun. Most of my 22 time went to bolt gun or AR derivatives. Got a real MP5 recently (SP) and dusted it off. Works great. Probably only a couple thousand rounds through it. Accuracy- I have no idea. It runs pretty well. Build quality- good, when you consider the real MP5s are stamped parts too.
Fun little gun, but frankly, I find the circle/post front with the castle/turret back to be, antiquated. Very MP5…
It’s fun to shoot, slap that bitch into battery, and play SAS with some steel- but then... Get a good friend to buy one and then offer to buy the ammo for some range sessions, then watch Navy SEALs, 5 Days, and Die Hard. Repeat every few years…