Whose carry handle? Some are for 20" barrels, some for 14.5". Some are knockoffs. What are the forge marks?
"The commercial handle (.040" offset) is meant for use on carbines without an F-marked FSB or a taller sight post, and the mil-spec handle is meant for use on a carbine that has an F-marked FSB or has a taller sight post installed. The carry handles for the A4 and M4 rifles are the same. Both have 600 meter elevation adjustments as opposed to the A2's 800 meter elevation adjustments."
"The commercial handle (.040" offset) is meant for use on carbines without an F-marked FSB or a taller sight post, and the mil-spec handle is meant for use on a carbine that has an F-marked FSB or has a taller sight post installed. The carry handles for the A4 and M4 rifles are the same. Both have 600 meter elevation adjustments as opposed to the A2's 800 meter elevation adjustments."