I have a ptr 51 which is an HK clone. Basically an mp5 on steroids. It's an 8.5" .308 roller delayed gun. It runs flawless, never had an issue. It has a Dead air muzzle break, sb tactical adjusting brace, and a HK factory A2 stock if you wanna go that route. I have a bunch of metal mags, two MKE turkish mags that are rare, and two 40 rounds mags that I've never used. I have case and everything that came from factory. Eotech not included in offer.