My cetme came and I ended up having to send it back. I had to pay the return shiping fee too. First the carrier wouldn't seat against the bolt when you cycled it. I released the lever from all the way back too. I've read that the new receivers are sometimes tight and you have to work it a few times. Even after about 30 times it would seat at times and not at others. Also when I disassembled the bolt and carrier I found the firing pin broke in half. Sure hope the next one is better.