The Black Rain Ordnance AR15 Carbine Buffer Parts Kit, 5.56mm (part no. BRO-CBK) supplies everything needed to complete a carbine-length buffer assembly on a 5.56mm AR15 build. The kit includes a buffer tube, the BRO carbine buffer itself, a carbine buffer spring, a castle nut, and a flat lock plate, covering the core hardware between the lower receiver and the stock. Builders replacing worn buffer components or finishing a new carbine build get a matched set from Black Rain Ordnance instead of sourcing each part separately.

Key Specifications

• Buffer Tube Included the carbine-length buffer tube itself.
• BRO Carbine Buffer Black Rain Ordnance’s carbine-weight buffer.
• Carbine Buffer Spring matched spring tension for carbine-length operation.
• Castle Nut Included secures the buffer tube to the receiver extension threads.
• Flat Lock Plate Included keeps the castle nut from backing out.

Frequently Asked Questions

What does this kit include? A buffer tube, carbine buffer, carbine buffer spring, castle nut, and flat lock plate.

What length AR15 build is this kit for? A carbine-length 5.56mm buffer assembly.

Buy the Black Rain Ordnance AR15 Carbine Buffer Parts Kit, 5.56mm

Finish your carbine buffer assembly with a matched Black Rain Ordnance kit, shipped to your FFL for transfer. Shop the Black Rain Ordnance lineup in our AR15 parts category from our Lubbock, Texas gun shop.