As long as we are confessing...
I confess to buying guns because I had ammo with nothing to shoot it with.
I confess to buying guns because it was there.
I confess to buying guns for no reason at all. ;)
I confess to hanging around gun shops to see if I am willing to outbid the shop keeper on trade ins.
I confess to buying a good scope when it was on sale, then buying a good rifle to go under it.
I also confess to buying oddball, hard-to-find magazines, then buying the weapons that fit them. I had a good supply of FN P90 and FiveseveN mags (and pouches, and ammo) before I had a weapon to use them in. That has since been corrected.