I tightened down the magazine nut as tight as it would go and the barrel was still loose, but when the oring was under the magazine nut the barrel was not loose. I guess it just needed that little oring to make the barrel tight i to am glad that it was a simple fix. Bernie P When i buy new i expect it to be 100% to but if i just have to leave that little oring under the magazine nut then i guess it is okay and the guy at the gun shop is a good friend of mine and i don't think he would lie to me and the gun does function properly.
jr97