Strike Industries Tribus Enhanced Castle Nut & End Plate FDE

The Strike Industries Tribus Enhanced Castle Nut & End Plate in Flat Dark Earth delivers superior weapon retention and streamlined profile management for AR-15 platforms. This precision-machined upgrade replaces standard components with enhanced functionality that eliminates common failure points while maintaining mil-spec compatibility.

What Makes This Different

The Tribus system integrates castle nut and end plate functions into a cohesive unit that distributes stress more evenly across the receiver extension threads. Unlike traditional separate components that can work loose under sustained fire, this enhanced design maintains consistent torque specifications through thousands of rounds. The proprietary anti-rotation features prevent backing out without requiring additional staking procedures.

Key Features

• Integrated castle nut and end plate design eliminates component separation
• Precision CNC machined from 7075-T6 aluminum with Type III hard anodizing
• Anti-rotation tabs prevent loosening under recoil stress
• Ambidextrous QD sling attachment points rated for 300 pounds
• Low-profile design reduces snag points during tactical movements
• Flat Dark Earth finish matches Strike Industries accessories
• Compatible with mil-spec buffer tubes and AR-15/M4 platforms

Field testing demonstrates consistent performance across temperature extremes from -20°F to 140°F without thread degradation or loosening. The enhanced surface area contact reduces wear on aluminum receiver threads compared to standard steel castle nuts. Competition shooters report maintained zero retention through high round count training sessions, while tactical users benefit from the streamlined profile during close quarters operations.

Technical Specs

• Material: 7075-T6 aluminum construction
• Finish: Type III hard anodized Flat Dark Earth
• Thread specification: 1.185"-24 TPI mil-spec
• QD socket rating: 300-pound working load limit
• Weight: 1.2 ounces (34 grams)
• Compatibility: AR-15, M4, and mil-spec buffer tube systems
• Installation torque: 35-40 foot-pounds recommended
• Country of origin: Made in USA

This enhanced castle nut and end plate combination addresses the weak points of traditional AR-15 rear assemblies while adding functional improvements that matter in demanding applications. The integrated design philosophy eliminates guesswork during installation and provides long-term reliability that standard components cannot match.