Catch, Magazine, Revision 5 - Unmarked

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   Catch, Magazine, Revision 5

Like many carbine parts, the magazine catch has gone through several revisions. 

The clubs number system does not represent the ordnance revisions, but we all know that later in the war the magazine catches were modified for more sliding clearances and identified by the letter "M" on catch push face.

With the advent of the M2 carbine and the magazine needing extra support there was another design change which added support tang. This is easily identified by using the M underlined on the push face. 

In the 1952 Modified Work Order Changes No. 1 we see they dropped the M from the push face. 

What is not pointed out is that the  area where the spring detent rides is a shape change.

This is depicted on our web pages, but seems to go unnoticed. 

I do receive emails asking about these catches, so I figured I would share on the forum for discussion. 

It is my guess that the drop of the M is possibly as a time/cost savings factor.
Or maybe due to how these catches are made. I suspect some form of centrifugal or lost wax casting where the M might not transfer well, or to fragile of a detail for the process. 

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Dan's Notes Members Profile Send Private Message Find Members Posts Add to Buddy List Recruit Joined: Jun 21 2025 Status: Offline Points: 9	Post Options Post Reply Quote Dan's Notes Report Post Thanks(0) Quote Reply Topic: Catch, Magazine, Revision 5 - Unmarked Posted: Nov 21 2025 at 8:54am
	Catch, Magazine, Revision 5 Like many carbine parts, the magazine catch has gone through several revisions. The clubs number system does not represent the ordnance revisions, but we all know that later in the war the magazine catches were modified for more sliding clearances and identified by the letter "M" on catch push face. With the advent of the M2 carbine and the magazine needing extra support there was another design change which added support tang. This is easily identified by using the M underlined on the push face. In the 1952 Modified Work Order Changes No. 1 we see they dropped the M from the push face. What is not pointed out is that the area where the spring detent rides is a shape change. This is depicted on our web pages, but seems to go unnoticed. I do receive emails asking about these catches, so I figured I would share on the forum for discussion. It is my guess that the drop of the M is possibly as a time/cost savings factor. Or maybe due to how these catches are made. I suspect some form of centrifugal or lost wax casting where the M might not transfer well, or to fragile of a detail for the process.

New2brass Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527	Post Options Post Reply Quote New2brass Report Post Thanks(0) Quote Reply Posted: Nov 21 2025 at 8:57am
	Long time club member and contributor Eddy Yuja. 81mm on online auctions, has one of these listed for anyone looking to add an example to their collection. https://www.gunbroker.com/item/1138094236
	My Wish List

New2brass Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Dan Pinto, How Can I help Joined: Nov 29 2015 Location: CCC Status: Offline Points: 5527	Post Options Post Reply Quote New2brass Report Post Thanks(0) Quote Reply Posted: Dec 01 2025 at 11:33am
	After I posted the link above it sold in short order. I hope it was one of our members! If anyone else is looking he listed another, priced very reasonable IMHO https://www.gunbroker.com/item/1138093883
	My Wish List

Smokpole Members Profile Send Private Message Find Members Posts Add to Buddy List Hard Corps Joined: Oct 21 2019 Location: Madison ohio Status: Offline Points: 1484	Post Options Post Reply Quote Smokpole Report Post Thanks(0) Quote Reply Posted: Dec 03 2025 at 6:16pm
	" Eddy Yuja. 81mm on online auctions, has one of these listed " This is one that I recently sold to him in a lot of spare parts. I can vouch for it being the real deal.
	OGCA Life member NRA Life member Ashtabula Rod and Gun Life member