• Universal design works with both AR15 and AR10/SR25 receivers and buffer tubes.

• Work with or without Law Tactical Folding Stock Adapter equipped lowers. Both AR15 and AR10/SR25.

• Designed to keep the receiver extension (buffer tube) in alignment by preventing rotating during installation or maintenance onto the lower receiver.

• Maintains alignment when loosening or tightening the castle to proper torque.

• Black Hard coated anodized aluminum construction with nylon bolts included.

• Intended for use with a buffer tube vice block (Geissele Reaction Block recommended)