The solid click i've been looking for - Battle Arms Development Ambidextrous Safety Selector

This is a superb replacement for the non-communicative plastic safety that comes with the M&P15-22. This ambi safety is clicky and positive, like a normal AR-15 safety. Also, this one has a 90 degree and a 60 degree throw detent channel on each end of the safety "barrel". Assembly is self explanatory once you remove the stock safety but the included directions are helpful. The two safety lever arms dove tail onto each end the safety "barrel" and are secured in place with a reverse-to-tighten set screw arrangement with 5 in/lbs of pressure. Seemed kinda of questionable at first but has held in place with hundreds of flicks of the safety. Be sure to drop some oil on the included detent prior to install for smoother operation. Such a good upgrade I'm gifting one to a friend.