
Availability: In Stock
Current Stock: Out of stock
The Strike Industries Tribus Enhanced Castle Nut & Extended End Plate in blue is a lightweight, durable upgrade for the back end of your AR-15 platform rifle. This two-piece system replaces your standard castle nut and end plate with a more rigid, refined design that reduces rattle and improves the overall feel of your stock assembly. Whether you're building a precision rifle, upgrading an existing platform gun, or just tired of that stock rattle, the Tribus gives you the kind of fit-and-finish detail that separates a dialed-in rifle from a stock assembly.
Strike Industries has engineered the Tribus to work reliably in field conditions while maintaining a clean, modern aesthetic. The blue finish is eye-catching without being flashy—it's the kind of accent color that looks at home on a working rifle. Installation is straightforward for anyone comfortable with basic AR armorer tasks: remove your current end plate and castle nut, drop in the Tribus components, and torque to spec. No special tools or exotic techniques required.
This is one of those upgrades that doesn't change how your rifle shoots, but noticeably improves how it feels in your hands and shoulders. If you're swapping stocks frequently, building multiple uppers, or just want tighter tolerances on your lower receiver, the Tribus is a smart, affordable piece of the puzzle.
Yes, the Tribus Enhanced Castle Nut & Extended End Plate is designed as a direct replacement for standard AR-15 platform rifles. It uses the same mounting interface as traditional castle nuts and end plates.
The product includes the castle nut and extended end plate. You'll need your existing buffer tube or the appropriate buffer tube for your setup, plus an AR armorer's wrench or similar tool to torque the castle nut.
The extended design provides a larger contact surface and improved rigidity at the back of the receiver, helping to eliminate the rattle and play you may feel with standard end plates. It's a quality-of-life upgrade that makes a noticeable difference in how your stock seats.
Strike Industries finishes are applied to hold up in typical rifle use. Like any finished component, it will show wear over time with hard use, but it's not a cosmetic-only product—the finish is there to protect and look good doing it.

SKU: 115727217 • Width: 2.5in • Height: 1.7in • Depth: 4.1in • Weight: 0.26oz





Availability: In Stock
Current Stock: Out of stock
The Strike Industries Tribus Enhanced Castle Nut & Extended End Plate in blue is a lightweight, durable upgrade for the back end of your AR-15 platform rifle. This two-piece system replaces your standard castle nut and end plate with a more rigid, refined design that reduces rattle and improves the overall feel of your stock assembly. Whether you're building a precision rifle, upgrading an existing platform gun, or just tired of that stock rattle, the Tribus gives you the kind of fit-and-finish detail that separates a dialed-in rifle from a stock assembly.
Strike Industries has engineered the Tribus to work reliably in field conditions while maintaining a clean, modern aesthetic. The blue finish is eye-catching without being flashy—it's the kind of accent color that looks at home on a working rifle. Installation is straightforward for anyone comfortable with basic AR armorer tasks: remove your current end plate and castle nut, drop in the Tribus components, and torque to spec. No special tools or exotic techniques required.
This is one of those upgrades that doesn't change how your rifle shoots, but noticeably improves how it feels in your hands and shoulders. If you're swapping stocks frequently, building multiple uppers, or just want tighter tolerances on your lower receiver, the Tribus is a smart, affordable piece of the puzzle.
Yes, the Tribus Enhanced Castle Nut & Extended End Plate is designed as a direct replacement for standard AR-15 platform rifles. It uses the same mounting interface as traditional castle nuts and end plates.
The product includes the castle nut and extended end plate. You'll need your existing buffer tube or the appropriate buffer tube for your setup, plus an AR armorer's wrench or similar tool to torque the castle nut.
The extended design provides a larger contact surface and improved rigidity at the back of the receiver, helping to eliminate the rattle and play you may feel with standard end plates. It's a quality-of-life upgrade that makes a noticeable difference in how your stock seats.
Strike Industries finishes are applied to hold up in typical rifle use. Like any finished component, it will show wear over time with hard use, but it's not a cosmetic-only product—the finish is there to protect and look good doing it.
SKU: 115727217 • Width: 2.5in • Height: 1.7in • Depth: 4.1in • Weight: 0.26oz
