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3/3/2005 3:01:26 PM EDT
I ordered a complete Colt 6520 upper from Gundealer3 off the EE.  I noticed that the bolt that came with it isn't proofed with the MPC;  is there a logical reason for this, or was the bolt changed out...I've never seen a Colt bolt w/o this proof mark
3/3/2005 3:06:32 PM EDT
[#1]
The model you bought should have a MPC marked bolt.
3/3/2005 3:08:54 PM EDT
[#2]
Are there any markings at all?
3/3/2005 3:15:49 PM EDT
[#3]
Quoted:
Are there any markings at all?
\

Nope....the C is on the bolt carrier, but no markings on the bolt.........
3/3/2005 3:30:08 PM EDT
[#4]
The "MPC" is sometimes difficult to detect.  I'm guessing it's there.  Try using a magnifying glass under a bright light?
3/3/2005 3:41:10 PM EDT
[#5]
All Colt bolts should be marked MPC.
3/3/2005 3:44:17 PM EDT
[#6]
Quoted:
The "MPC" is sometimes difficult to detect.  I'm guessing it's there.  Try using a magnifying glass under a bright light?


very true

Those markings are almost imperceptible on some. I mean very, very, lightly marked.
3/3/2005 3:44:49 PM EDT
[#7]
You should'nt need a magnifying glass, they are very clearly marked.
3/3/2005 4:29:48 PM EDT
[#8]
The one I got from Gundealer3 is marked with a "C".  I could not find any "MP" at all.
3/3/2005 5:12:40 PM EDT
[#9]
Quoted:
You should'nt need a magnifying glass, they are very clearly marked.



Really? Then how come I owned an SP1 for 15 years before I even knew there WAS a marking?  Many of the Colt bolts; especially the ones headed for the civie market, historically had the very light marks.  I will agree though, that all the military pieces I've ever seen were clearly marked.
3/3/2005 5:55:53 PM EDT
[#10]
It looks like a faint 'C' on my bolt.....they come according to SAW's website MPC or C.....
3/3/2005 9:27:48 PM EDT
[#11]
Some current manufacture Colt's MFG CO INC bolts are only marked C.
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