Real Avid 7.62MM Scraper The Ultimate Way to Clean a Gas Piston & Bolt Scrapes Carbon from all Gas Piston Surfaces including the Firing Pin Tip, Bolt Face, Piston Face, Piston Head Grooves, Piston Head Circumference and Piston Shaft Muzzle Brake Wrench Slot to Assist Opening the Gas Tube Access Lever Flat Driver for Pistol Grips and .25" Bit Driver