Sons of Liberty Gun Works Sons of Liberty Gun Works Castle Nut 17-4 Stainless Class 3A Threads MSRP: $30.00 Was: Now: $25.00 Add to Cart
Armaspec Armaspec Self-Retention Castle Nut FDE AR-15 / AR-10 - ARM6521-FDE MSRP: $29.99 Was: Now: $26.99 Add to Cart
Armaspec Armaspec Self-Retention Castle Nut Black AR-15 / AR-10 - ARM6521-BLK MSRP: $29.99 Was: Now: $26.99 Add to Cart
Fortis MFG Fortis END-CN-COMBO QD Castle Nut & End Plate | Heavy-Duty AR-15 Buffer Tube Combo with Quick Disconnect Sling Mount MSRP: $39.59 Was: Now: $20.95 Add to Cart
Fortis MFG Fortis Manufacturing AR-15 Standalone Castle Nut Anodized Black - CN-Stand MSRP: $12.95 Was: Now: $11.35 Add to Cart
Strike Industries Strike Industries Enhanced Castle Nut w/ QD - Fits AR-15, Black MSRP: $60.95 Was: Now: $57.95 Add to Cart
Strike Industries Strike Industries AR Enhanced Castle Nut & Extended End Plate w/ QD - Fits AR-15, Red MSRP: $60.95 Was: Now: $55.95 Add to Cart
Guntec USA Guntec USA AR-15 Extreme Duty Wide Castle Nut For Car/M4 Buffer Tube - CASTLE-EXD MSRP: $16.95 Was: Now: $14.95 Add to Cart
LanTac USA LanTac USA RPS Ratchet Plate System - 01-UP-RPS MSRP: $54.99 Was: Now: $52.95 Choose Options
Strike Industries Strike Industries Ultralight Multi-Function End Plate and Anti-Rotation Castle Nut - Black MSRP: $32.95 Was: Now: $29.95 Add to Cart
Strike Industries Strike Industries TRIBUS Enhanced AR-15 Castle Nut and End Plate MSRP: $66.95 Was: Now: $59.95 Choose Options
Sons of Liberty Gun Works Sons of Liberty Gun Works Castle Nut 17-4 Stainless Class 3A Threads Sons of Liberty Gun Works (SOLGW) Castle Nut – Class 3A Threads – SOLGW-CASTLENUT The Sons of Liberty Gun Works Castle Nut (SOLGW-CASTLENUT) is a 2026-spec essential component for builders who... MSRP: $30.00 Was: Now: $25.00 Add to Cart
Armaspec Armaspec Self-Retention Castle Nut FDE AR-15 / AR-10 - ARM6521-FDE Armaspec Self-Retention Castle Nut – Flat Dark Earth – ARM6521-FDE The Armaspec Self-Retention Castle Nut (ARM6521-FDE) is an innovative, high-performance alternative to the standard Mil-Spec steel... MSRP: $29.99 Was: Now: $26.99 Add to Cart
Armaspec Armaspec Self-Retention Castle Nut Black AR-15 / AR-10 - ARM6521-BLK Armaspec Self-Retention Castle Nut – Black – ARM6521-BLK The Armaspec Self-Retention Castle Nut (ARM6521-BLK) is a revolutionary solution for AR-platform builders who want to move beyond the... MSRP: $29.99 Was: Now: $26.99 Add to Cart
LWRC International LWRCI 9-Tooth Barrel Nut LWRCI 9-Tooth Barrel Nut / Locking Ring The LWRCI 9-Tooth Barrel Nut (U01-0178C01) is the essential structural component for securing the proprietary barrel system on LWRCI rifles. Unlike standard... MSRP: $24.00 Was: Now: $19.00 Add to Cart
Luth-AR Tacfire Carbine Lock Ring Castle Nut - Black TacFire Official AR15 Castle Locking Nut for .223/5.56 Rifle carbine stock used to tighten buffer tube to receiver. Finish: Maganese Phoshate Application: AR10, AR15, M-16, Carbine MSRP: $5.99 Was: Now: $4.99 Add to Cart
LBE Unlimited LBE Unlimited Mil-Spec AR15 Castle Nut - Black Threaded Steel ring used to retain the carbine buffer tube to the lower receiver Finish: Maganese Phoshate Material: 4140 Steel Application: AR10, AR15, M-16, Carbine Made in the USA< MSRP: $8.99 Was: Now: $6.95 Add to Cart
Fortis MFG Fortis END-CN-COMBO QD Castle Nut & End Plate | Heavy-Duty AR-15 Buffer Tube Combo with Quick Disconnect Sling Mount The Fortis Manufacturing Castle Nut and End Plate Combo is a premium, mil-spec compatible set designed for AR-15 and AR-10 platforms. It includes a reinforced castle nut and a heavy-duty end plate... MSRP: $39.59 Was: Now: $20.95 Add to Cart
Fortis MFG Fortis Manufacturing AR-15 Standalone Castle Nut Anodized Black - CN-Stand Fortis Manufacturing, Inc., Castle Nut, Black, Anodized Finish, Mil Spec - CN-Stand - 810103343054 Product Description Assembling or upgrading an AR-15 receiver extension assembly requires a... MSRP: $12.95 Was: Now: $11.35 Add to Cart
Strike Industries Strike Industries Enhanced Castle Nut w/ QD - Fits AR-15, Black Yet another first, the Enhanced Castle Nut and Extended End Plate combo represent Strike Industries' dedication to thinking outside the box. The SI Enhanced ECN and EEP stand out from the generic... MSRP: $60.95 Was: Now: $57.95 Add to Cart
Fostech, Inc. Fostech Ultra-Light Castle Nut This castle nut is an excellent choice for anyone looking to save ounces on their build. Approximate Weight: .20 ounces Material: Aluminum MSRP: $19.99 Was: Now: $13.99 Add to Cart
Strike Industries Strike Industries AR Enhanced Castle Nut & Extended End Plate w/ QD - Fits AR-15, Red Yet another first, the Enhanced Castle Nut and Extended End plate combo represent Strike Industries’ dedication to thinking outside the box. The SI Enhanced ECN and EEP stand out from the generic... MSRP: $60.95 Was: Now: $55.95 Add to Cart
Guntec USA Guntec USA AR-15 Extreme Duty Wide Castle Nut For Car/M4 Buffer Tube - CASTLE-EXD GunTec has a AR15 Extreme Duty Wide Castle Nut for Car/M4 Buffer Tube to provide more strength and durability for your AR. Made in the USA. FEATURES: US Made Steel Gen 3 -Newest Design Fits... MSRP: $16.95 Was: Now: $14.95 Add to Cart
LanTac USA LanTac USA RPS Ratchet Plate System - 01-UP-RPS The LANTAC RPS™ Ratchet Plate System removes the necessity to stake castle nuts in place after fitting. It also provides a QD Sling attachment point directly below the buffer tube. It utilizes a one... MSRP: $54.99 Was: Now: $52.95 Choose Options
Strike Industries Strike Industries Ultralight Multi-Function End Plate and Anti-Rotation Castle Nut - Black The Strike Industries Ultralight Multi-Function End Plate and Anti-Rotation Castle Nut are designed to update and upgrade the often neglected castle nut and endplate system. Now available in an... MSRP: $32.95 Was: Now: $29.95 Add to Cart
Strike Industries Strike Industries TRIBUS Enhanced AR-15 Castle Nut and End Plate MSRP: $66.95 Was: Now: $59.95 Choose Options
Luth-AR Luth-AR Carbine Lock Ring (Castle Nut) - CS-02 Threaded Steel ring used to retain the carbine buffer tube to the lower receiver Finish: Maganese Phoshate Application: AR10, AR15, M-16, Carbine MSRP: $5.99 Was: Now: $4.99 Add to Cart
