The Monarch Arms threaded barrel for the Ruger 57 pistol utilize4140 steel blanks from Shaw barrels. They are then finished, heat treated and black nitrided to a beautiful finish. The barrels are approx. 5.5″ long and come with a knurled thread protector that utilizes a rubber gasket to keep the protector snug without the need for a special tool.
The barrel threading is 10X1 thread pitch and comes with the required 10/1-1/2X28 thread adapter.