Nav1.2 is a sodium channel that is involved in action potential generation in neurons and in muscle. Nav1.2 is not a classic cannabinoid receptor but its activity is modulated by cannabinoids. Since cannabinoids have a physiological effect on Nav1.2 it is effectively a cannabinoid receptor.
Nav1.2 is found in brain and muscle. The highest density is found in unmyelinated axons and in developing pre-myelinated axons, and also present in neuronal cell bodies and dendrites.
Hill, A.J., Jones, N.A., Smith, I., Hill, C.L., Williams, C.M., Stephens, G.J., and Whalley, B.J. (2014). Voltage-gated sodium (NaV) channel blockade by plant cannabinoids does not confer anticonvulsant effects per se. Neurosci. Lett. 566, 269–274.