That would certainly strengthen a defense. I had not stopped to consider a limited number of mags purchased all at one time and no others exist. My bad.If I have ten Glock 19 mags and a receipt for 10 Glock 19 mags dated 12/1/22 - that is enough, unless the gov can find another 10 mags in my possession for which I do not have a receipt.
But that is not something I am worrying about.
I was assuming others are like me where they are here and there, purchased here and there over time and even I couldn't tell you where or when they came from with any degree of accuracy.
It has never been a legal requirement to keep receipts for any firearm related purchases so... I have not. Intentionally at times.
"Where, when, and from who did you obtain that walther ppk/s?"
If it's good enough to satisfy the Senate.... It's good enough for me.