I have been shooting the M-1 Garand since some time in the early 1970s’ for both fun and competition, and I never noticed that all of the En Block clips I have, (in excess of 50), have various makers marks on them.
A quick google search turned up [too]much information, more quickly than I thought it would, including a 2008 post in IAA, which- for a reason unknown to me- when opened only shows all posts from “HISTORIAN”, but signed by others… with a notation of putting the clip list on IAA, but my search turned up nothing in ‘Reference’, and ‘Resource Center’ would not allow me to search! M-1 Garand clips ).
Here is a sampling of mine, the most prevalent being DAQ and BR-W 6.
The 4 round and 5 round competition clips are AEC 3, a civillian manufacturer.
Following the photos is a .pdf list of manufacturers, as complete as I can compile from many web site forums, some old enough that there is no active links on them.
I do not have the Pyle book, and cannot find my copy of Bruce Canfields’ tome. Please forgive me for not putting markings next to descriptions, this has already taken me several hours… and I am plumb tuckered out.
M-1 Garand En Block Clip Codes .pdf (40.8 KB)