Colt CAR-15 XM177 E2

[OLIAR15]

Within two weeks only I received the license and picked up the gun and the original barrel with the front sight. No markings at all. The barrel was pretty corroded inside and pitted with weak grooves. I started cleaning it, hoping it would improve, but it just made the pitting shinier and more obvious.

I still intended to install it in order to bring the gun back to its original condition. In any case it’s not meant as a precision rifle, and I will fire it very occasionally in full auto mode at short to medium distances.





Seems to be a 10 inch barrel, not 11.5



With the flat ring instead of the Delta / tapered ring.



So I came to the conclusion that it is an XM 177 E2 lower with an XM 177 E1 upper. If these thing could talk.

Some details :





The large aperture sight seems to have been ground off, maybe for a faster target acquisition at short range.



As a consequence, the small aperture sight falls backwards



And the front sight was bottomed out in order to compensate



... with pliers ...

[Mike2336]

Your ground off rear sight isn't the Large Aperture ("L"), it is the Long Range Aperture. The short range sight in method was for POA/POI at 300 yards, and the "L" aperture was POA/POI 450yards +/-.

[ExplorinInTheWoods]

That is still one of the coolest rifle produced.