[MosinRuger]

Looks like a nice little pistol! I have a STI 1911 in 9mm, its a full size gun though not compact. my mags hold 9 rounds but i usually only load 8 because the last one tends to stick on the feed lips and just feels like its pushing it, i have loaded with 9 and it did function though.

I found it pretty interesting that the .45 mag fit in it!, my 9mm mags for have some indentations along the sides though to i guess that makes sense.

 

[MosinRuger]

Forgive me for not knowing all the proper terms when describing some of these parts, but I will try to be as descriptive as I can.
Does your mags also have a small, spacer type thing at the back of the mag, inside, I ll try to post a pic of my mag looking down into it, if i can.

I've never inspected them so closely but now that your asking I have checked out both of the two mags I have. Each of them has fired many hundreds of rounds with just one or two malfunctions
Now looking at the twos gas they are quite different. The one it came with us made by mecgar, not sure on that spelling. This one does not have the spacer on the back but the front of it has an indentation that runs down the front of the magazine. This pushes the bullets back towards the rear of the mag. This seems to compensate for the shorter length of the 9 mm compared to the .45.

My second magazine(colt) has no indent on the front but it does have a spacer similar to the one in your pic.

They both have the indents on the side presumably to keep the rounds centered in the magazine.

It's interesting that despite the difference in the placement of the rounds in the mag they both work fine. One has the bullets pushed forward while the other has them pushed to the back of the mag.

I imagine these nuances are all due to the adaptation of the .45 frame/design to a 9mm platform.

Posted From Gun & Game Mobile!

 

[MosinRuger]

The only thing I'll say, or rather, point out, regarding the two mags is the picture I borrowed and included below is that the magazine on the left looks to have a small bend or slightly bent lip where the bullet would sit. Not sure but I'd think it might possibly cause a FTF maybe at some point?

Here, this should help. And please, forgive my inability to draw a good circle with a mouse. lmao

Right, as i stated in the post, that one has an indent that runs all the way down the front of the mag, this compensates for the lack of "spacer in the rear that the other mag has, equal but opposite. If you look at the third pic i posted you will see the indent going down the front of the mag

 

[MosinRuger]

lol well the circle does serve it's purpose of identifying which area were talking about, however squiggly it is!

How about this, were you refering to the magazine follower, or the actual casing of the magazine?

I do realize the magazine followers are slightly different in shapes as well as the actual magazine contruction itself.

nonethelss, i am not having any issues with either magazine posted, they both run fine in my STI. regardless of the differences in design.