BCM Rifle Company.
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BCM® Bolt Upgrade and Rebuild Kits.
BCM® Extractor Spring Upgrade Kit.
The BCM® Extractor Spring is a heavy coil design made for the increased extractor tension required on many AR15, M4, M16 short barrelled rifles. This product also improves the reliability of standard 16" and 14.5" carbines. The BCM® Extractor Spring is manufactured by a 9001:2000 facility employing the latest precision equipment.

BCM® starts with only the highest quality chrome silicon material, heat treats to stress relieve the product and shot peens to add increased strength. This kit also includes the new black extractor insert, standard on all M4, M4A1, MK18 carbines and the recent new standard on M16A4 rifles. The BCM Extractor Spring is so strong the Mil-Spec Crane O-Ring will probably not be needed, but it is included.

This kit includes:
BCM® Extractor Spring (chrome silicon, heat treated & stress relieved, shot peened)
Crane Ind O-Ring (Mil-Spec)
Black Extractor Insert

 
BCM® SOPMOD Bolt Upgrade and Rebuild Kit.
Based on the SOPMOD designed bolt upgrade and rebuild package, this kit is designed to breath new life into your bolt assembly. The bolt assembly is the heart of your AR15 rifle system and preventative maintenance used by professionals insures these systems keep running even under the harshest of conditions. This is a great spare parts kit to keep your AR15, M16, M4 running in the field.

This kit includes:
Extractor made to USGI specs (shot peened)
Extractor pin
BCM Extractor Spring (chrome silicon, heat treated & stress relieved, shot peened)
3 USGI Gas Rings
Crane Ind O-Ring (Mil-Spec)
Black Extractor Insert

BCM Rifle Company Specifications.