I have 2 sets of Colt endplates and castlenuts all basic mil spec nothing fancy.
These are used because they were lightly staked but then they were removed shortly after because I ended up wanting endplates with a qd mount so lesson learned and ended up using fancier castlenuts instead as well. They can be reused but they will show the slight stake marks on them. They are being sold as a pair one end plate one castlenut.
$10 shipped for each pair
If you buy both pairs I would do $15 shipped
PP F&F no mention of parts
If you want to see photos please send me your email or number and I'll send them to you.