[ARCHIVED THREAD] - Bolt code identification

Posted: 5/17/2014 11:06:07 PM EDT

I have a Colt bcg that I purchased in 1988 and the bolt is marked MPGC. Is the G a date code ? Please see pics. Thanks for your time, Curthttp://i1339.photobucket.com/albums/o709/greedo408/colt005_zps562b662e.jpg http://i1339.photobucket.com/albums/o709/greedo408/colt001_zpsc3dd4844.jpg

Posted: 5/18/2014 5:54:48 AM EDT

[#1]

yes as far as I know it's a date code, but I dont know the exact meaning.
one of my colts (2000 era MT6601) is marked MPFC with a line under the F.
Then Colt stopped marking bolts that way.

Posted: 5/18/2014 6:29:00 PM EDT

[#2]

Thanks man. From searching around I was fairly certain it was a date code. I was hoping that someone had found the meaning of the codes.

Thanks again, Curt

Posted: 5/19/2014 5:49:50 AM EDT

[#3]

would have been nice to track down a chart with the respective codings. Interesting that the label indicates that the buyer must have class III....goes to show how old it is.

Mark

Posted: 5/19/2014 9:30:35 AM EDT

[#4]

it's also interesting that the label name the M4 since it was adopted in 1994

Posted: 5/19/2014 8:22:25 PM EDT

[#5]

Here's some info on Colt bolt markings from member Molon and old threads that I had in my notes.

MPC - Colt

MPCX (X = MFG LETTER CODE)

MP A C - letter "A" means month code Sep '95 (no C letter to avoid confusion), then under dash line - then over dash line - then all month code dropped

MPIC

C - Colt

C - ground down MPC with large letter "C" over the previous erased marking

MPD - Diemaco (COLT Canada now)

Here's the link for the noted old thread with bolt marking pictures.

Colt bolt markings - archives thread link

[ARCHIVED THREAD] - Bolt code identification

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[ARCHIVED THREAD] - Bolt code identification

[ARCHIVED THREAD] - Bolt code identification