Product Reviews for PJAMBS - AR-15 Bolt Carrier Carbon Scraper AR-15 Bolt Carrier Carbon Scraper by Neil (2024-04-13 11:54:56) Rating: 5 / 5 - 5 - Excellent Owned Product for: less than 1 year Pros: This AR-15 bolt carrier carbon scraper works great and cuts down cleaning time at the range by half. Cons: Other thoughts: