I have a XLR buffer tube weight kit, they have some scratches, scuffs & marks. Not new by any means, but fully functional.
From XLR
"The Buffer Tube steel weight kit is comprised of (4) 5.5-ounce steel weights. The stackable weights allow the user to adjust the balance point of the rifle. Weight added to the back of the rifle can range from 5.5-22 ounces depending on the configuration.
NOTE: Not compatible with Carbon stocks."
$70 shipped
From XLR
"The Buffer Tube steel weight kit is comprised of (4) 5.5-ounce steel weights. The stackable weights allow the user to adjust the balance point of the rifle. Weight added to the back of the rifle can range from 5.5-22 ounces depending on the configuration.
NOTE: Not compatible with Carbon stocks."
$70 shipped