1911 9mm mag help needed

[Alan550]

   I'm working with a new shooter to get her into NRA Action Pistol match competition.  She bought an STI Trojan that needed many parts replaced to work in Metallic Category.  We replaced the plastic MSH with a steel one and installed a Protocall Design prone pad.  It has a narrow opening at the bottom that won't allow many of the magazines available to fit.  Believe it or not, a Wilson 38 Super (47 series) mag works fine, fits, feeds and drops out fine.  In checking availability, they don't seem to be made any more (47 series).  All I can find are the new ETM mags that have a wider base-pad than the older 47 series mags, so they won't fit inside the prone pad.

   Can the newer ETMs take the base pad from an older 47 series mag?

   Anyone know of a 1911 9mm or 38 Super mag that has a base pad that's not any wider than the mag itself? 

   Thanks,

   Alan~^~

[jcc7x7]

My Wilson ETM's are the same size but there 5 years old or so

What about CMC standard mags with the plastic base pad trimmed to fit?!

[BeerBaron]

Open up the inside of the prone pad? Then you can use whatever. 

[GringoBandito]

Cal Tripp research. They may be able to point you in the right direction. Good people!

http://www.trippresearch.com/store/index.html

 

[Norther]

Perusing my handy Brownells catalog, it looks like Checkmate, Colt, McCormick XP, and Metalform would work. Also, there's a low profile steel base pad available separately for ETMs that may fit (Brownells says .45 only, but worth looking into.).

[JimmyBob]

 

The Ed Brown mags have a basepad that doesn't add anything to the width of the base and flares out only slightly as it drops away.

 

 

Edited January 28, 2017 by JimmyBob

[Alan550]

Thanks for the input guys.  I think we'll get it solved by replacing the prone pad with a newer version that has a larger opening.

 

Alan~^~