To save yourself from boogering up the factory one time use aluminum nut, these tool steel nuts are a direct replacement and are able to be reused countless times. These will work with the SR15 URX II, 3, and 3.1
They will work with older factory KAC URX wrenches, or the aftermarket ones we made in the past.
Barrel nuts come with a black oxide finish which gives a dull matte black appearance.
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