Colt 6921 5.56mm Upper Receiver Assembly | 14.5" Barrel

correction: after inspecting both bcgs again under intense lighting, i did find the most faint, barely legible MPC markings ever, on the bolts. so for my previous comment, i stand corrected. but as for all the visible bolt wear, it's not just one bolt... it's that way on the pair.

i recently purchased two of these based on product description and what i received was disappointing. While both carriers have a faint etched C, neither bolt has the customary Colt "C" or MPC . Nothing at all! one bolt also also showed very heavy wear around the firing pin hole and debris up inside the gas key. Clearly, not what one expects on a Colt Upper advertised as New. Choose wisely.

Upper was what It should be, but the packaging was pretty shorty! It came in a Colt rifle box. It was significantly damaged and the upper was just sliding around inside the box, it wasn’t damaged but I would have thought that it would have been packed with styrofoam or bubble wrap. Thanks again for your quality product!

Very reasonable pricing on an item getting harder to find. Received item in great condition and quick turn around. I will shop here again

Fast shipping. Low price. Part just as advertised.

Its a beautiful upper its the new version with Cage codes and meets my expectations of Colt Firearms .....

This upper is a 6921...just don't go by the thumbnail, You will recieve it with a Magpul MBUS and the front sling mount will be on the bottom of the FSB...not offset to the left. aside from those minor details, everything is Colt marked and high quality

BUIS SHOWN IN PHOTO WAS MATECH, BUIS SENT ON UPPER WAS MAGPUL. BIG DIFFERENCE TO ME BUT APPARENTLY TOO MUCH TROUBLE TO UPDATE THE PHOTO TO BE CORRECT ITEM.

Very happy with it but be careful because whats pictured isn’t exactly what you get. The rear flip up sight is a Magpul.

really, all it lacks is a Matech rear sight, M203 front handguard ferrule cuts, and side sling swivel to be perfect. It comes now (apparently, and from everybody) with the MBuis and swivel installed to standard front mount and guard ferrule. Upper is now cage code marked rather than C marked, both receiver and barrel, M4 stamped at rail front. Front sight is F-height, although not marked, the guess being since all guns are flattop today, no need for marking. For those wanting to know lengths, the upper with supplied A2 flash hider is 15 7/8ths", which is SBR. The length with a Smith Ent. Vortex is 16 1/4", a gain of 3/8ths". This is still 1 1/4" shorter than the 16.1" with A2 length of 17 1/2" total length. That 1 1/4" DOES make a difference in handiness in tight quarters, even that 3/8ths" between the A2 and Vortex is palpable. I will leave it up to you to decide whether the SBR route is worth it.