m4 mini Ritter difference

Joined
Jan 25, 2014
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674
Hey, so I have recently acquired a few BM m4 mini Ritter.. my question is this.. why are two of mine numbered and the third isn't??! I also noticed that the "cpm-m4" writing is different.. on the two that are numbered they just looked stamped, and the other one almost looks like it's got a circle around it.. please help?! Any explanation is appreciated..

(I know pictures would help, but Idk how to post them, but I can email them to anyone who is willing to help.)

Thanks in advance
 
Wasn't there an non numbered orange one with the M4 in an oval that was apparently a set of 73 or around there that people said could be either a misprint or higher heat treat?
I could have made that up, my memory isn't that great.
558DLCM4ORG-500?
 
I know there is the orange one.. but I have never heard anything about a different heattreat.. I'm not seeing a misprint anywhere .
Godzilla78- does yours have the white circle around the cpm-m4, right behind the thumbstud?
 
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