Question about LAGE and M10 .45 subgun

[Pollard Street Pawn & Gun]

Hey folks, I need some help. I have a Mac 10 in .45, and it is a subgun. I’m a class III dealer and have an opportunity to purchase an upper made by LAGE in 9 mm and wonder if it will fit on my lower. Here is the model information: Max 10/9 mk2 in 9mm.  Any thoughts?  Need more info?

[Craigan]

It will fit and work on the .45 lower, the issue I've had trouble with is the magazine adapter for the 9mm magazines in the magwell. It has a feed ramp incorporated into it and requires fitting/shaping.

[Pollard Street Pawn & Gun]

This is good information to have. Would the following magazines fit in my mag well without an adapter? The seller is representing them as this.
 

“Original Military Armament Corporation M 10 9mm 32 round”

[Grasshopper]

Hi,

I'd say they will not fit the M10/45 w/o the adapter.  The M10 9mm magazines were based on the Walther MPL/MPK magazine which is not the shape of a 45 GG magazine.

Enjoy,

Grasshopper

[Pollard Street Pawn & Gun]

Makes perfect sense!  Any ideas where I could get an adapter for this mag well on the M 10 .45?  I can’t get anyone at LAGE to return my call.

[Craigan]

FTF industries has them. They also do Mac 10/9mm magazines which have worked decently well for me. 
Just have to get the angle of the feed ramp to work well enough for your needs. 

Edited May 1, 2023 by Craigan