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 with an integrated quick-disconnect (QD) sling swivel mount.
Machined from high-strength steel with a durable black anodized finish, this combo provides a secure, rock-solid mounting point for your buffer tube while adding a convenient QD sling attachment. The end plate is designed to sit flush and prevent rotation, ensuring long-term reliability even under heavy use.
Key Specifications:
- Includes: One reinforced castle nut + one QD end plate
- QD Mount: Integrated quick-disconnect swivel socket (compatible with standard QD sling swivels)
- Material: High-strength steel
- Finish: Black anodized
- Thread: Standard 1-3/16" x 16 for mil-spec buffer tubes
- Weight: 2.8 oz (combined)
Why Choose the Fortis Castle Nut and End Plate Combo?
- Rock-Solid Security — Reinforced castle nut and anti-rotation end plate prevent loosening over time.
- Built-in QD Sling Mount — Allows fast attachment of a QD sling without adding extra bulk or separate parts.
- Premium Construction — Made from high-strength steel with a durable black anodized finish for long-term reliability.
- Easy Installation — Direct drop-in replacement using standard tools.
- Fortis Quality — Engineered for serious shooters who demand strength and functionality in every component.
This combo is an excellent upgrade for any AR-15 or AR-10 build where a reliable QD sling mount and secure buffer tube retention are priorities.
