Check the listing for details. BCG Carbon Scraper Cleaning, Carbon Multi-Tool Scraper for Cleaning Maintenance. Condition: New. Listed at 11.80 USD. US patent design:The tool is specifically designed to quickly clean the tough to reach surface of the bolt carrier group. Works with all .223/5.56.US patent design: The tool is specifically designed to quickly clean the tough to reach surface of the bolt carrier group. Works with all .223/5.56. The carbon scraper clean most parts on the bolt carrier group: the back of the bolt, inside the BCG, around the locking lugs, around the firing pin and behind the cartridge extractor. This compact handy gun cleaning tool is made of sturdy light steel. Each surface is precision cut to match different surfaces on the bolt carrier group. Improved Version: Through special processing, the edge of this carbon scraper tool is smooth and will not poke your fingers.