Product

Product Name: BCM Extractor Spring Upgrade Kit Design: Heavy coil for increased extractor tension Compatibility: AR15, M4, M16 short barreled rifles, standard 16″” and 14.5″” carbines Quality Assurance: Manufactured in a 9001:2000 facility with precision equipment Material: High-quality chrome silicon Heat Treatment: Stress-relieved and shot peened for increased strength Includes: BCM Extractor Spring (chrome silicon, heat treated, shot peened) Crane Ind O-Ring (Mil-Spec) Black Extractor Insert (standard on M4, M4A1, Mk18 carbines and M16A4 rifles) Additional Note: Mil-Spec Crane O-Ring likely not needed, but included