^^^ Yes, that

Thanks for the pic.

I see a little of that on mine, but I haven't shot it as much as yours. 

Is that just the finish coming off, or is there pitting in the metal?

R51 Fan. 

When you straightened the tab, didn't the magazine follower pop out the top of the magazine when empty?

Magazine tab mod.  Modified and original magazine.  Look closely at the magazine on the left and you will see the tab that holds the follower from popping out has been slightly trimmed and lowered.  The magazine on the right is original. 

The purpose as I understand this is to allow some room for a bullet that has "nose dived" into the magazine to move forward and pop up.

Since doing this mod to one magazine AND shorting the followers in both magazines, I haven't encountered a "nose dive" failure to feed with either magazine.   The nose dive used to be fairly common and it is clearly not so now.  At present, these magazines have digested a couple boxes of Tula steel without issue with just the follower modification.

Bottom line is I'm not convinced that modifying the tab on the front of the magazine is necessary. 

This picture shows a modified and original R51 follower.

Short story:  The stock follower is too long to provide enough clearance to close the slide on a full magazine.   The shorter follower provides this clearance.  You could probably get by with trimming you followers much less than this; however, these magazines work.

Although this has been covered elsewhere on the forum and is kind of old news;  I am providing a picture for clarity.

Thanks everyone for the welcome

Stay safe

I'm glad to see you, and look forward to buying one of everything from your first product run.

Here I am!

David McGinnis
Sierra Vista, AZ


(No silly, that's an R51 in my pocket)