The Fortis Standard Castle Nut is manufactured from a solid piece of billet aircraft grade aluminum that offers a significant weight reduction to your castle nut. If you're trying to save ounces, this is a great way, but without sacrificing durability. The castle nut will fit onto mil-spec buffer tubes and quickly upgrade the form and function of your build. The standard castle nuts only come in black; however, if you're interested in additional colorways you can find our LE™ K1 and K2 systems below:
- Material: Aircraft Grade 7075-T6 Aluminum
- Weight: 0.2 oz!
- You will need a standard stock wrench to install
- Type III Hardcoat Anodize
- Made in the USA!
**Photo of raw finish - will come anodized**