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BOLT-UP SYSTEM™ BARREL NUT WRENCH Reviews & Ratings

The Bolt-Up System™ Barrel Nut Wrench is a proprietary spanner wrench required to install The Daniel Defense AR15 Lite Rail and RIS II Rail System. This wrench is designed to be used with a 1⁄2 Drive Torque Wrench.

See all of our AR15s and AR15 parts here.

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A necessity for any DD ris ii owner

Having proper torque on your parts is key, and the heart of the ris rail is the barrel nut. Don't mess it up because it can throw off your zero and shift your rail. Make sure your gun is in spec. Be a man.