#html-body [data-pb-style=T2CGSPP]{justify-content:flex-start;display:flex;flex-direction:column;background-position:left top;background-size:cover;background-repeat:no-repeat;background-attachment:scroll}Harrington & Richardson 14.7" Pencil Barrel made from 4150 Chrome Moly Vanadium Steel with a parkerized finish with chrome lining. Features an M4 extension, 1/2"x28 threaded barrel, 1/7 twist rate, and Carbine gas system. his barrel is the perfect choice for your Retro or K.I.S.S build.