Tactical Springs LLC Enhanced Power 3-Pack 4-Coil Bolt Extractor Spring

Engineered for extreme reliability, Sprinco's extractor springs use heat treated, cryo-processed chrome silicon and a specialized moly-disulfide plating to deliver consistent performance under high-round counts and harsh conditions.The extractor springs from Sprinco USA undergo heat treatment, stress relief and cryogenic processing to enhance durabilityThey are coated with molybdenum disulfide to optimize performanceThe 5-coil spring is optimal for all 5.56x45mm barrel lengths, however, it may exert excessive force on barrels measuring 18 inches or longer or on bolts with very tight tolerancesConversely, the 4-coil spring is advised for use with longer barrels and when reloading brassThe extractor springs are engineered to endure temperatures up to 750 deg F and are intended to be the sole springs required for the lifespan of your boltWhen utilizing the 5-coil version, D-Fender rings are unnecessary