I'd recommend Lakeline, Al is a member here. His followers have a very good rep.
I suspect you do need more clearance between the feed ramp and the follower. This is a pretty common especially in the 40.
Kahr should replace your broken ones, I've lost most of my inside contacts to address this kind of thing, I need to work on that I guess.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."