This is a reduced power hammer spring manufactured by Wolff Gunsprings. It has been coated in Nylon 11 by Volquartsen and comes mounted to a hammer strut for easy installation. The nylon coating allows the spring to be incredibly resistant to corrosion and most cleaning solvents and chemicals while maintaining a very slick profile.
The contact surface of the strut where it meets the hammer has also been polished to reduce friction.
This item is backed by a lifetime warranty by Volquartsen.