Since I live in California I'm limited to 10 rds, so I have the ASC.... Initially I had all sorts of issues, but I managed to resolve them all with a sharp knife and a Scotch Brite Pad in a Cordless Drill. The ASC Magazines are Powder Coated Stainless Steel.... So what I did was buff some of the powder coat away from the Feed Lips. This stopped the Bolt Dragging issue and I took the Knife and scraped around the Magazine Catch Hole, that eliminated the Magazine Catch Engagement issue. Since they are Stainless Steel they wont rust with the powder coat missing. I hope this helps.