None of us has bought something only to discover.....
We already had one.....
Nope....never..........
I built a AR pistol a couple years ago. Loaded up some 110g 300 Blackout rounds to try out with it. Bought a Blade brace, but it would not go on the foam padded buffer tube. So it sat in my safe since then, unfired. Then last year some time I bought a Sig Brace, and its sat on my bench for months.
Last night I decided I would order a new buffer tube for it so I could use the Sig brace. Had three websites pulled up, and just for kicks I decided to open the Sig box. Much to my surprise there was a buffer tube inside that box. I closed the webpages and had a good laugh at myself. I could have shot that pistol months ago it I had just opened that stupid box. But at least I didn't buy a new one just to discover I didn't need it.