Quick view THORDSEN CUSTOMS THORDSEN CUSTOMS FRS-15 AR-15 STOCK ASSEMBLY Thordsen Customs FRS-15 Stock assembly replaces the pistol grip & collapsible stock. "NECESSITY IS THE MOTHER OF INVENTION" Sadly, several states in our great country mischaracterize certain types of semiautomatic firearms, like... Now: $119.95 Was: MSRP: Choose Options Compare