Show me the rule that says you can make the opening wider laterally. 22.4 only authorized longitudinally. In the specific example given, the stock magwell opening was already pretty wide and from the photos didn't appear to been made wider than stock; however the inside of the magwell had an angle that was smoothed out. that's why in my original post I said it looked legal for that gun. Other guns, maybe not. I would not take the argument smoothing out the INSIDE of the magwell allows you make the OPENING wider (laterally). welcome to open.
-rvb
Mongo just pawn in game of USPSA.
(It was not copy righted and I really liked it when I read it the first time).
If you look at the Sevingy Speedway closely (that Troy sez is kosher) you will note that the opening is widened laterally. Not a lot, but as much as the stock width of material would allow. Don't have the credits or desire to argue what is and ain't allowed, just trying to understand.