Tuning PP750 Help

I removed my hammer and now I can't get it back in. It slid out pretty easily but now it won't go back. The handle is not blocking it as I can open and close it without any issues.

Here's a photo showing how far the hammer will go into the receiver. It goes feel like its getting hung up on the receiver it self. Thank so much your help!!

750-hammer.1607776516.jpg