Found two lower cost alternatives to the pricey choices that the WWSD project recommends.
They recommend a JP captured/silent buffer spring at $130. Armaspec has a two spring system with five buffer weight options starting at $80.
https://www.bing.com/videos/search?q...C6&FORM=VRRTAP
They also recommend a $90 Norgon ambidextrous magazine release at $90. Arms Unlimited has one for $25.
https://www.bing.com/videos/search?q...5E&FORM=VRRTAP
Both videos compare the lower cost alternatives to the higher priced ones. I probably won’t buy either and have never handled any of the four. Thought those of you who like suppressed and those looking for ambidextrous controls might like to save on these components for bigger optics/ammo budgets.