In Stock
Type
parts
Last Seen
May 21, 2026
Guntec USA AR15 Castle Nut Wide Steel Nitride AR Fits Mil-Spec
Sold byShooting Surplus•Posted May 20, 2026
Compare prices for AR-STONER Enhanced AR-15 Carbine Buffer Tube Lock Ring Steel Matte$12.85
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Deal Summary
- Currently in stock.
- Category: parts
- UPC: 714569646868
- SKU: ZCASTLEEXD
- Brand: Ar-Stoner
Price History
Deal Details
The Guntec USA GUNTEC AR15 CASTLE NUT WIDE delivers enhanced strength and durability for demanding AR platform builds, crafted in steel with a nitride finish to resist wear and corrosion while maintaining a clean, low-profile appearance. This wide, heavy-duty castle nut is designed to fit Mil-Spec and commercial buffer tubes, providing secure, reliable torque and fit for a variety of rifle configurations. Built for AR enthusiasts who demand consistency and longevity, its steel construction and p
Other Offers for This Product
Active offers from your catalog for AR-STONER Enhanced AR-15 Carbine Buffer Tube Lock Ring Steel Matte.
Comparing 4 retailers carrying this product
Lowest Price: $11.99
Highest Price: $19.99
You Save: $8.00
Avg Discount: 17% off
GUNTEC AR15 CASTLE NUT WIDE EXTREME DUTY
Guntec UsaBattleHawk ArmorySKU/UPC: 714569646868
$11.99$16.95Save 29%
View at BattleHawk ArmoryGuntec USA AR15 Castle Nut Wide Steel Nitride AR Fits Mil-Spec
Guntec UsaShooting SurplusSKU/UPC: ZCASTLEEXD
$12.85
View at Shooting Surplus
Guntec USA AR15 Castle Nut Wide Extreme Duty Black
Guntec UsaOptics PlanetSKU/UPC: 2AH-CAN-ZCASTLEEXD-CASTLE-EXD
$16.99$27.99Save 39%
View at Optics Planet
AR-STONER Enhanced AR-15 Carbine Buffer Tube Lock Ring Steel Matte
Ar-StonerMidwayUSASKU/UPC: 785212
$19.99
View at MidwayUSA