The T3 Tension Barrel is manufactured using the highest quality materials available. The entire barrel is made from a 1" stainless steel barrel blank, providing the most solid platform of any lightweight barrel. The muzzle is threaded 1/2x28 tpi for suppressors or muzzle brakes. T3 barrels are chambered using a match grade chamber that is suitable for reliable semi-auto fire. A special carbon fiber sleeve is tensioned on the barrel to provide a rigid, accurate and lightweight barrel. These barrels are designed to provide a lifetime of reliable and accurate performance in a lightweight package. Blackened stainless finish.