Castle Nut Luth-AR AR346

This Luth-AR AR346 castle nut is made of black anodised aluminium, which provides excellent corrosion resistance. It can be used to lock an AR-style buffer tube, so it stays in place and can’t twist relative to the weapon or airsoft replica. It can also be used to lock something like a receiver end plate in place. There are four slots in the rim of the Luth-AR AR346 castle nut, which allow you to tighten it firmly by using a C-spanner.