Bravo Company BCM Extractor Spring Upgrade Kit The BCM Extractor Spring Upgrade Kit is an essential reliability enhancement for AR15, M4, M16, and short-barreled rifle platforms. Engineered with a heavy coil design, this spring delivers the increased extractor tension required to ensure consistent, dependable extraction on demanding builds. It also improves function on standard 16" and 14.5" carbines, making it a worthwhile upgrade for any AR-platform shooter. The extractor spring is manufactured at an ISO 9001:2000 certified facility using premium chrome silicon material, then heat treated, stress relieved, and shot peened for maximum durability and strength. The kit includes the black extractor insert now standard on M4, M4A1, and Mk18 carbines as well as the M16A4, along with a Mil-Spec Crane O-Ring for a complete, drop-in upgrade solution. Product Highlights Heavy coil design provides increased extractor tension for enhanced reliability on AR15, M4, M16, and short-barreled rifle platforms Premium chrome silicon material, heat treated, stress relieved, and shot peened for superior strength and longevity Manufactured in an ISO 9001:2000 certified facility using precision equipment for consistent quality Includes black extractor insert -- the current military standard on M4, M4A1, Mk18, and M16A4 rifles Mil-Spec Crane O-Ring included for a fully complete, ready-to-install upgrade kit Specs Brand: Bravo Company MPN: BCMBCMEXSPRING1 UPC: 812526020628 Compatible Platforms: AR15, M4, M4A1, M16, Mk18, Short Barreled Rifles Spring Material: Chrome Silicon Treatment: Heat Treated, Stress Relieved, Shot Peened Kit Includes: BCM Extractor Spring, Black Extractor Insert, Mil-Spec Crane O-Ring Manufacturing Standard: ISO 9001:2000 Certified Facility Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.