Howdy,
I was hoping to get some help from any 121 M1 owners. I just pulled a mint one out of my Dad's safe. Here's my question, when you have a shell in the tube, will the bolt stay open to feed the chamber? On mine, when a shell is in the tube, it rests against the carrier latch which moves it back a little so the bolt will not remain in the open position. I disassembled the gun and it seems to be designed that way (there is a slot in the carrier latch rather than a hole), but makes loading odd.
Note: this is the early verison of the gun, there is no shell release button on this model
Thanks in advance!