 The California DOJ Bureau of Firearms has attested under oath that the U-15 stock, the Hammerhead Grip and the MonsterMan Grip do not constitute a pistol grip and are therefore legal when used on a detachable magazine semiautomatic centerfire rifle with none of the features listed in CA PC 30515(a)(1)(A-F).Most AR-15 manufacturers now make lower receivers which qualify as "Off-List" Lower (OLL) receivers which are legal to possess and use in the state of California.With regard to standard capacity magazine devices, after January 1, 2000, it is illegal to offer for sale, import, manufacture, give, or lend (although it is legal to possess and use) any detachable box magazine with a capacity exceeding 10 cartridges.