Building Confidence

[FfNJGTFO]

Quick Question. I'm cleaning up my Watch list on GB, now that most of my activity on there is pretty much done... (until the next time)...


I had this one item on my watch list that I was curious as to whether or not I needed it. It's described as an "Accuwedge Tension Pin" for AR-15 Receivers.





Supposedly, it helps tighten up the upper and lower receivers by applying spring tension to each. I guess it takes the place of the rear pin.



Necessary? I don't have any "looseness" issues with my 1st build. But it seemed interesting enough to put on my watch list.





Thanks!