Geissele ar15 reaction rod - Geissele AR-15/M4 Reaction Rod

I bought this over 2 years ago and it was solid purchase. I can't tell you how many upper receivers I built and serviced with it. I think it is a must have for any avid AR builder. I love how you can use it to turn the upper you are working on in different positions since it indexes off of the barrels locking lugs. For example, installing the gas block, torqueing handguard screws and attaching accessories to your handguard. It is best used for installing muzzle devices but I found that you can also use it for torqueing down barrel nuts as well. This reaction rod is built like a tank and I have dropped it a few times by accident but I found little to no damage on it. If you are looking for a tool that will last a long time for building and servicing upper receivers then look no further. I would definitely buy this again and highly recommend it.