[ARCHIVED THREAD] - M-4 Multi caliber

Posted: 12/28/2008 7:43:51 PM EDT

I recently purchased a custom made M-4. It is a 5.56 cal.
The lower receiver says "CAL MULTI" No markings on the barrel.
I assume I can just change uppers and change the caliber. Is this correct?
What makes this different than other M-4's on the market that are marked with one specific cailber? Can changing uppers on these also change calibers? If so, why aren't they mark "cal multi"
Thanks for you help on this guys.

Posted: 12/28/2008 7:53:13 PM EDT

[#1]

Simply put, the caliber markings on the lower don't really mean anything, and some lowers, as you've noticed, are marked "Multi" while others have no marking for caliber at all.

Quoted:
I assume I can just change uppers and change the caliber.

That is correct.

Posted: 12/28/2008 8:16:46 PM EDT

[#2]

Quoted:
... No markings on the barrel. ...

Uh, what kind of gun did you get?

Posted: 12/29/2008 5:45:34 AM EDT

[#3]

Quoted:

Quoted:
... No markings on the barrel. ...

Uh, what kind of gun did you get?

A M-4 from Blackwater, 5.56 cal
Thanks for the help guys.

[ARCHIVED THREAD] - M-4 Multi caliber

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[ARCHIVED THREAD] - M-4 Multi caliber

[ARCHIVED THREAD] - M-4 Multi caliber