WHAT DOES COLT 6921 FOR SALE MEAN?

  The magwell engraving has altered, and Colt has rebranded all their carbines as "Carbine" and no longer marked M4 Carbine.  This can be the only transform into the product or service.Effectively, there's two variants with the 6940P, and also the one I'd, I'm %ninety nine certain the rings to the piston had been similar to the rings about the bo