Get to know the Knights Armament Company's new URX4 Handguard

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KAC covers a concise history of their handguard systems before showing how to install the new URX4 on an AR upper. A couple things set this rail system apart. First, it uses the KeyMod attachment system in place of Picatinny rails on the sides and bottom. Second, it has an integrated barrel nut. That means the whole free-float system is one piece. It's very simple, strong and uncomplicated. Installation is a breeze with the included wrench. You don't even need a torque wrench since installation is timed and torqued using a shim set.

We had a look at the system and a bunch of the new KAC KeyMod accessories at SOFIC. It's great to see how much support the KeyMod system is getting and KAC looks like they are going all-in, judging from the range of KeyMod rail parts they are putting out with the URX4.

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