Are you 100% sure these are *Colt* carry handles? Then I might be interested in a spare for my Colt flattop carbine (normally w/optic) so I don't have to borrow my Colt Comp HBarII carry handle.
Colt carry handles do not work well on non-Colt flattop uppers and vice-versa (without poss. changing front sight posts) as FS is, IIRC, 0.040" on Colts than other brands' rifles. So I can't conveniently use my other Bushy carry handle for the Colt carbine...