Pretty well done.
But... not for me.
The pedantic a-hole in me has to point out:
The "Zapper" logo was only ever printed on the right side of the gun (whether orange/grey or grey/grey). And Nintendo complicated it further than that.
The right side should read "©1985 Nintendo®" with "Zapper™" angling up underneath the end of Nintendo -- as you have recreated pretty well in basic form.
I'm not pointing that out for my own gratification, however. It's to bring up the fact that the Nintendo lawyers are some seriously devoted people; and the company, as a whole, is very litigious. I wouldn't be surprised if you get a cease and desist letter, simply so they can get a reply in writing that you aren't producing the item(s) for resale.
Nintendo is more litigious than any other video game company, ever.
(Except, maybe, Commodore. They were vicious and brutal in their prime! But they're dead, so it doesn't matter any more.)