Ultradyne UD Buffer to Picatinny Adapter Black. Compatability with UD Picatinny stocks transforms your chassis into an easily detacheable packable build. Simply screw the adapter into your buffer tube threads and the Picatinny section locks in firmly ensuring proper alignment. Specifications for Ultradyne UD Buffer to Picatinny Adapter: Manufacturer: Ultradyne Color: Black Fabric/Material: 6061-T6 Aluminum Finish: Anodize Features of Ultradyne UD Buffer to Picatinny Adapter Hardware Included Easy Installation Adapts buffer tube to Picatinny Hardcoat Anodized Package Contents: Ultradyne UD Buffer to Picatinny Adapter Installation Hardware Included Ultradyne UD20179: UD Buffer to Picatinny Adapter Black