AR-15 Mil Spec Castle Nut

Condition:

New

Minimum Purchase:

1 unit

Shipping:

Calculated at Checkout

Description

AR-15 Steel Castle Nut

Secure your build with unmatched strength and reliability. The AR15 / M16 / AR10 Steel Castle Nut is engineered to provide rock-solid performance in even the most demanding shooting conditions. Whether you’re upgrading or building from scratch, this Mil-Spec component delivers the durability, precision, and dependability serious shooters demand.

✅ Universal Compatibility Across Platforms

Designed for AR15, M16, and AR10 platforms, this steel castle nut offers:

✅ Seamless fit with all standard carbine buffer tubes
✅ Versatile use across multiple rifle configurations
✅ A trusted solution for gunsmiths and DIY builders alike

✅ Notched for Staking – Enhanced Lock-Up Stability

No compromises on security. The precisely machined staking notches allow for:

✅ Rock-solid lock-up
✅ Prevention of movement or loosening during high round counts
✅ Added confidence in long-range accuracy and consistent recoil control

✅ Premium Phosphate Coating

Finished with a durable phosphate coating, this castle nut provides:

✅ Long-lasting corrosion resistance
✅ A clean, professional appearance
✅ Extra surface hardness to endure rugged field conditions

✅ Lightweight, High-Strength Construction

Weighing only 0.6 oz, this castle nut offers:

✅ Minimal impact on your rifle’s total weight
✅ A perfect balance between strength and portability
✅ Smooth handling without sacrificing durability

✅ Mil-Spec Precision Fit

Manufactured to strict Mil-Spec dimensions, the A1Armory castle nut ensures:

✅ Consistent and accurate fit
✅ Reliable compatibility with other mil-spec parts
✅ Confidence in every assembly or upgrade

✅ 100% Made in the USA ??

Support American manufacturing with a product that’s:

✅ Proudly made in the USA
✅ Built to the highest standards of craftsmanship and consistency
✅ Backed by the reputation and trust of A1Armory

✅ Key Features at a Glance:

✅ Fits AR15, M16, AR10 platforms
✅ Mil-Spec construction for precision fit
✅ Phosphate-coated for corrosion resistance
✅ Staking notches for enhanced security
✅ Lightweight at just 0.6 oz
✅ Made in the USA with pride and precision

Upgrade your rifle’s backbone with the A1Armory Steel Castle Nut—a small but critical component designed to deliver big results in every shot. Whether you're a seasoned operator or a passionate enthusiast, this is the quality you can count on.

Add to Cart Now — Lock down your build with confidence and American-made strength!