This Master Armorer's wrench will prevent scratched and stripped threads by using the tool that was designed for your weapon. This multi-purpose AR tool works for disassembling hand guards, butt stocks, gas tube assemblies, free floating hand guards, etc.. Completely powder coated Black durable finished for extended wear. A necessary tool for any AR enthusiast. ***If you have access to Utube.com, type in: USMACHINEGUN.COM and you will find our quick video on barrel removal.