Just curious. My dad said it's a Colt SP1 upper, but it has no markings. I'm not familiar with carry handle uppers, but it also appears to have a rear sight that's adjustable for windage, and I haven't seen too many of those on just a regular carry handle upper.

Anyone know what it might be? I'm trying to find out so I can figure out what it's worth, it has finish wear due to age but no rust or anything, and shoots just fine. (Please don't kill me for obvious changes made to it, that was all my dad.)



I can get better pictures when I get home if needed.

SP1 is an A1, that is an A2 upper.

That's an A2 style carry handle, definitely not a Colt SP1 upper.

Thanks, gents. Appreciate it.

Though the tear drop forward assist and flat delta ring are unusual for an A2 upper.