My concerns are preventing dry fire impacts while shooting 22LR. I have a SIG with 22LR caliber excahnge kit but the slide does not lock back after the last shot. I'm counting my shots but but I'd liek to have some additional insurance. I got it used and it was dry fired eough so that it would not eject/cycle reliabley. Now it's fixed and don't want to do any new damage. So my 10 round mags beome 9, oh well. I hope the #4 drywall anchors will feed. What a great idea!