WE ARE REPLACING THESE WITH NEW PCT CASTLE NUTS
Why we like these:
It's a castle nut.
Official Description From White Label Armory:
White Label Armory's castle nuts are manufactured to Mil-Spec dimensions and fit all standard carbine buffer tubes.
- Steel
- Phosphate Coated
- Weight: 0.6 ounces
- Notched for Staking
- 100% American Made