Bought a model 20, forerunner to the 21A, last week. Have had a bunch of Beretta 950, 21A, 70s and 84s over the years. Discount does not have a half cock notch safety. I cannot see Beretta making a gun without the safety feature. I read on a rimfire forum that model 21As had this notch break off. Has anyone ever experienced that with one of these micro Berettas? I wonder if Beretta will still work on one of these?