First owner since 2007. Barrel length is 20" and has a Heavy contour with a "6.8 Rem 1-10" marking. Last time I checked it does use the SPEC II chamber dimensions for the hotter loads. Bore & chamber are not chrome-lined. Comes with one 5 round PRI magazine. Since the upper is not considered a gun but an accessory, I can ship it to just about anywhere.