I have experienced the same feed problems. Polishing the ramp did not help. I took the gun and a pair of pliers to the range yesterday . After a nose dive I removed the rounds from the mag and used the pliers to SLIGHTLY opened the front of the cartridge hold down rails on the top of the...
Had a similar thing occur last week. My 40 shield continued to experience failure to feed with round nose diving and getting stuck on ramp. Found the take down lever broken off just like yours, but did not have mag fall out or round stuck in barrel. Can no longer rotate take down lever. It's on...