Only 40 000 of these assault rifles were made before production switched to a Type 81-1 with a side-folding metal stock. The Type 81 comes with simple adjustable iron sights. It has a sighting range of 500 m. There is no provision to mount any kind of optics. This assault rifle can launch rifle grenades. Cpl. Ally Beiswanger travels to Camp Pendleton, California to experience ExFOB'14, an event to showcase the Corps' newest ideas for commercial energy harvesting technologies and government systems. Build Track's John & Caleb Vincent, Ohio halfstock rifle parts set, with 13/16", or 7/8" straight octagon barrel Price: starting at $736.82 Find Current Values for your Antiques! Rifle; Vincent (John), Percussion, Tiger Maple Half-Stock, Patch Box. A Vincent Converted Percussion Half-Stock Rifle, .36 caliber, octagonal steel barrel.