Well, it uses a proprietary barrel nut, so you have to remove the gas system, lock the upper in a vise, remove the factory barrel nut and delta ring assembly, install the new, MI barrel nut, re-install the gas system with a low profile gas block, and then install the handguard. I'm a certified AR armorer so it was pretty routine for me. It's not rocket surgery but it requires some specialty tools, mechanical aptitude, and a working knowledge of how the AR system works. Another thing you may notice on my handguard is the addition of a couple screws through the handguard and into the barrel nut for added security.