Advanced Technology AR-15 Mil-Spec Steel Castle Nut Black

The ATI AR-15 Mil-Spec Steel Castle Nut is a replacement castle nut for the AR-15 platform, used to secure the buffer tube to the receiver extension. It is machined from steel and finished in black to match standard AR-15 components.

This castle nut is listed as fitting AR-15 mil-spec and commercial/hybrid buffer tubes. The raw listing does not specify a thread pitch or torque value, so confirm fit against your receiver extension and buffer tube before installation. It is not compatible with .308 rifles.

• Brand: ATI
• Type: Castle nut (buffer tube)
• Platform: AR-15
• Material: Steel
• Finish: Black
• Size: Mil-Spec
• Fits: AR-15 mil-spec and commercial/hybrid buffer tubes
• Not compatible with: .308 rifles