Primary Weapons Systems Ratchet Lock Castle Nut & End Plate Kit – AR-15/AR-10 Buffer Tube Assembly

The Primary Weapons Systems Ratchet Lock Castle Nut & End Plate Kit provides a secure, tool-free method for retaining buffer tubes on AR-15 and AR-10 pattern rifles. The ratcheting design eliminates the need for staking while maintaining proper torque and preventing loosening under recoil. This kit is designed for shooters who want reliable buffer tube retention without permanent modification to the receiver or castle nut.

Machined from steel with a durable finish, the ratchet lock castle nut features indexed teeth that engage with the included end plate for positive lock-up. The end plate is compatible with single-point and two-point sling attachment systems. Installation requires standard AR armorer's wrench and torque to specification before engaging the ratchet mechanism. Suitable for mil-spec buffer tubes on carbine and rifle-length receiver extensions.

• Type: Ratchet Lock Castle Nut & End Plate
• Material: Steel
• Compatibility: AR-15/AR-10 Mil-Spec Buffer Tubes
• Locking Method: Ratcheting Teeth (No Staking Required)
• End Plate Features: Sling Attachment Point
• Includes: Castle Nut, End Plate