The Forge TM Hi-Capa hammer spring offers a faster, harder-hitting action and higher muzzle velocity. It increases the force the hammer strikes the valve, leading to higher gas output and potentially greater FPS, while a matched enhanced recoil spring provides a quicker cycle rate. This is especially beneficial when using an aftermarket metal slide. Key benefits • Faster cycle rate: The increased strength of the spring can speed up the cycling of the slide. • More realistic feel: A heavier spring creates a more realistic sound and feel when the gun cycles, which is often a desired upgrade for enhanced realism. • Improved "snappiness": Players report a more "snappy" or responsive feeling when firing, thanks to the increased cycling speed and power. • Potential for increased durability: Springs made from high-quality materials like stainless steel may have enhanced durability and corrosion resistance. • Greater consistency: By providing a more consistent and forceful hammer strike, the spring can contribute to a more consistent gas seal on the valve, which may improve overall consistency. ** Compatible with TM Hi-Capa 4.3/5.1.