Choate Recoil Compensator for Mini-14 made of solid steel, bath blued or S.S. Both models sight looks like the original M-14 Sight. The compensator is permanently attached to the gun barrel by a 1/8 inch spring steel roll pin. Drilling new role pin hole is required. We suggest this unit be installed by a gunsmith.Fits the older Mini 14 rifles with the .562 diameter barrel.