Enhance your AR platform with the Presma Aluminum Castle Nut, expertly crafted for .223, 5.56, and .308 buffer tube receiver end plates. This silver finish accessory offers superior durability and a sleek aesthetic. Engineered from high-grade aluminum, the Presma Castle Nut guarantees a secure fit and excellent resistance to wear and corrosion, making it an essential upgrade for avid shooters and builders alike. Compatible with all AR .223/5.56/.308 platforms Lightweight yet robust aluminum construction Corrosion-resistant silver finish Easy installation and reliable performance Elevate your rifle's reliability with the precision-engineered Presma Aluminum Castle Nut.