Strike Industries AR Enhanced Castle Nut & Extended End Plate QD

The Strike Industries AR Enhanced Castle Nut and Extended End Plate with QD transforms standard buffer tube assemblies into versatile sling attachment points. This precision-machined upgrade eliminates the need for separate QD mounts while providing a more secure castle nut installation than factory components.

What Makes This Different

Unlike standard castle nuts that rely solely on staking for retention, this enhanced design features aggressive knurling and an extended end plate that distributes stress across a larger surface area. The integrated QD socket accepts standard quick-detach sling swivels without adding bulk or weight to the rear of the rifle. Strike Industries machines both components from 7075-T6 aluminum with a Type III hard anodized finish that resists wear and corrosion better than mil-spec phosphate coatings.

Key Features

• Integrated QD socket eliminates need for separate sling mount hardware
• Enhanced castle nut with aggressive knurling prevents loosening under recoil
• Extended end plate design distributes buffer tube stress over larger area
• 7075-T6 aluminum construction with Type III hard anodized finish
• Compatible with mil-spec and commercial buffer tube extensions
• Accepts standard quick-detach sling swivels and push-button QD hardware
• Low-profile design maintains standard length of pull measurements

Field testing demonstrates superior retention compared to standard staked castle nuts, with the knurled surface providing multiple contact points that resist rotation. The QD socket maintains consistent engagement with sling hardware through thousands of attachment cycles. Law enforcement and competitive shooters report reliable sling transitions without hardware failure or loosening during extended training sessions.

Technical Specs

• Material: 7075-T6 aluminum alloy construction
• Finish: Type III hard anodized black
• Thread: Standard 1.17"-16 TPI castle nut threading
• QD Socket: Accepts standard 1.25" quick-detach swivels
• Weight: Approximately 1.2 oz combined assembly
• Compatibility: Mil-spec and commercial buffer tube extensions
• Country of Origin: Made in USA

This enhanced castle nut and end plate combination addresses two common AR-15 maintenance issues with a single upgrade. The integrated QD capability eliminates the need for additional rear sling mounts while the improved retention system reduces the likelihood of castle nut loosening during normal use.