Locks well, may need some tools

Posted by Andrew on 2nd Jan 2010

You will need a dremel tool with a cutting wheel OR a proper armorer's wrench and vise setup to install this. Once you remove the delta ring assembly (all of it, down to the barrel nut) this locks up very tightly on the barrel nut. There is zero wiggle in it and it comes with some thread locking goo that is made to keep the rail from coming loose from vibration, while still being removable with hand tools. My only issue is that the top rail is about half a millimeter off from my upper receiver's rail, and cannot be lined up any better due to the way it sits against the gas tube. It isn't noticeable unless you hold a flat object up against it, or try to mount something that spans the rail from the upper to the forearm.