I bought an almost brand new PC carbine in 9mm. It seemed to work just fine, until I took it apart to put in the glock magwell. The bolt jams on the magazine now and wont close unless I remove the magazine. Cycling ammunition is extremely poor as well. I figured maybe the magwell was faulty, so I put the factory ruger magwell back in and now the bolt jams open on the ruger mag too. I was very careful and nothing I can see has been bent or damaged. I'm extremely frustrated and now feel like just selling the whole damn gun and all the glock mags I bought for it. Anybody else run into this issue?