M-loc forend for JR carbine

Bought this directly from JR carbine last summer for my 40SW carbine. Sold the carbine so won’t need this anymore. 
Note- the barrel nut on the 40 was too large for the one on this forend. Perhaps JR sent me one intended for a 9mm version or for an AR. Extremely high quality. 13 inch length. Cost me 90USD. Letting go cheap as I don’t know exactly what rifle this will fit.