Makes install easy - Gas Block Genie Gas Block Alignment Tool For Ar-15

Although not necessarily a must have, it does make installing gas block much easier. If your barrel isn't dimpled or you're using a clamp on block it is a simple way to easily get the fitment correct much quicker and easier. Worth the money for the simplicity and using just a regular ball point gel pin I was able to wipe it clean for use on other builds in the future.