The Sprinco M4/AR-15 Yellow Reduced Power Carbine Buffer Spring is a high-quality buffer spring that offers many advantages. This spring is made from ASTM Grade A877 Certified Valve Quality Chrome silicon Wirestock. It has been heat-treated, stress-relieved, and dual-stage shot-peened post-winding for maximum durability and performance. The Sprinco Yellow spring is approximately 20% lighter than the White spring and is color-coded yellow for easy identification.
The Yellow spring offers consistent spring pressure through the cycle of the spring, resulting in fewer malfunctions related to spring operation, especially Type III malfunctions. It also provides improved and consistent cyclic function, and its resistance to heat-induced performance degradation is greater than other buffer springs.
The cyclic rate can be reduced with enhanced or extra power springs, and bolt bounce can be eliminated with optimal spring/buffer weight selection. The Yellow spring has a reduced operating cost as it won't need replacement during the life of the upper receiver assembly. This reduces downtime and the need to visit the armorer for spring replacement, making it the only buffer spring needed for the duty cycle of your carbine or rifle. Correct spring selection works reliably, consistently, and virtually indefinitely in all properly built and maintained AR platforms, providing increased "lock time" for faster sight recovery and platform stabilit