Product Description The Bravo Company BCMA(R) Extractor Spring Upgrade Kit (3 Pack) is engineered for shooters who demand reliable, consistent performance from their AR-15, M4, or M16 platform rifles. Featuring a heavy coil design, these extractor springs deliver the increased extractor tension required for short-barreled rifles while also improving reliability on standard 16" and 14.5" carbines. Each spring is manufactured at an ISO 9001:2000 certified facility using premium chrome silicon material that is heat treated for stress relief and shot peened for enhanced strength and durability. The kit includes the new black extractor insert -- standard on all M4, M4A1, Mk18, and M16A4 rifles -- along with Mil-Spec Crane O-Rings to ensure a complete upgrade solution right out of the package. Product Highlights Heavy coil design provides increased extractor tension ideal for AR-15, M4, and M16 short-barreled rifles Chrome silicon construction with heat treating and shot peening for maximum strength and longevity Manufactured at an ISO 9001:2000 certified facility using the latest precision equipment Includes black extractor inserts, now standard on M4, M4A1, Mk18, and M16A4 platforms Mil-Spec Crane O-Rings included for a complete, drop-in upgrade solution Specs Brand: Bravo Company MPN: BCMBCMEXSPRING3 UPC: 812526020635 Pack Quantity: 3 Spring Material: Chrome Silicon Treatment: Heat Treated, Stress Relieved, Shot Peened Compatible Platforms: AR-15, M4, M4A1, M16, M16A4, Mk18 Kit Contents: 3x BCM Extractor Springs, 3x Mil-Spec Crane Ind O-Rings, 3x Black Extractor Inserts 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.