The O/U barrels are choked tubed by Briley S-26. The O/U barrels weigh three pounds, two ounces with flush chokes installed. The gun weighs 7lbs 13oz. The barrel length is 31.5". Both bores are .730. Three flush chokes. Lt. mod at .716(.014) Mod..712(.018) and lt. full .702(.028). The barrel is stamped SO4 and serial number series AO26xxx. Non-tapered rib. Non selective trigger. Bottom firing first. Cast off and right hand palm swell.