One of my magazines if rough and doesn't feed 10 rounds well
I have tried polishing the follower button and the inside of the mag at the edges of the follower cutout
I haven't found the magic fix yet
Using candle wax as a lube on the inside of the slot works well for a little while
After several trips to the range I like the gun fine and consider on par with my mark II's
I also don't see that it has any real advantage over a Mark II
The Mark II takedown complaint goes away after you learn the trick