Colt A2 Adjustable Rear Sight Assembly for Fixed Carry Handle

Original Colt take off supposedly. Rare find. Looks unused or like new. This Rear Sight Assembly is for A2 Fixed Carry Handle as the elevation knob is adjustable from 300m to 800 meter (note the 8/3 marking). The parts kit is missing one set of 1x Rear Base Spring & 1x Rear Base Ball Bearing. Identified by item #7 and #8 in the schematic photo. Other than that the rest is all there. 

Price is firm. No trades. Shipping will be $23 extra.

Do me a favour, don't be that Kijiji guy... :)

Thanks for looking and best wishes.