I have an un-used/new 18” 224 Valkyrie 1:7 twist barrel that comes with their gas system the threads on the barrel. It has an adjustable gas block, gas tube, and break. Muzzle end of the carbon fiber is at .750”. Muzzle threads are 1/2-28 standard. The threads on under the break have a taper mount but it can fit multiple muzzle devices such as griffin dual lock surpressor mounts. I am looking for $550 shipped in conus with extra insurance on buyer’s cost/option. I accept PayPal ff or usps money orders.