The PSA AR-15 CAR Stock Lock Ring / Castle Nut is a reliable, budget-friendly essential component for any AR-15 build or repair. This mil-spec compatible castle nut securely fastens your carbine stock to the buffer tube, preventing loosening during heavy use while including the integrated lock ring (also known as the retaining ring or snap ring) for a complete, drop-in solution.
Manufactured in America by Palmetto State Armory, this black-finished castle nut is designed for standard AR-15 carbine buffer tubes and collapsible stocks. It’s perfect for:Building your first AR-15 from scratchReplacing a worn, stripped, or lost castle nutKeeping spares in your range bag or parts kitUpgrading or maintaining mil-spec reliability on your rifle or pistol
Key benefits include its durable construction, precise threading for easy installation (use with a castle nut wrench for proper torque), and proven performance backed by thousands of satisfied PSA customers.
Made in the USA with PSA’s commitment to quality, this part comes with a full lifetime warranty against defects in materials and workmanship (transferable, excludes normal wear or misuse). Add this must-have AR-15 castle nut to your cart today and keep your build rock-solid.
Upgrade or repair your AR-15 with the PSA AR-15 CAR Stock Lock Ring / Castle Nut – the affordable, American-made essential for securing collapsible carbine stocks. This mil-spec black castle nut includes the integrated lock ring, ensuring a tight, reliable fit on standard carbine buffer tubes. Ideal for AR-15 builds, replacements, spares, or maintenance – prevents stock wobble and delivers dependable performance every time.
Key Features:
- Genuine Palmetto State Armory AR-15 castle nut with lock ring
- Black finish, mil-spec compatible for carbine stocks and buffer tubes
- Made in America for superior quality and reliability
- Perfect for DIY builds, repairs, or spare parts kits
- Easy installation (torque to spec with castle nut wrench)
Backed by PSA’s lifetime warranty against defects
Whether you’re assembling a new PA-15 rifle, fixing a loose stock, or stocking up on critical AR parts
By purchasing PSA AR-15 Car Stock Lock Ring/Castle Nut Black from our online store, you are guaranteed to receive a high-quality item. We work with trusted brands to offer shooting and hunting enthusiasts, both amateur and professional, quality products at a reasonable price. Choosing to buy from us means opting for quality and practicality
The actual appearance of the product may differ from the image on the website. For additional information about payment, delivery, and product specifications, please contact us by phone or email.
