Great gift for the grandkid -- thoughtful and personal. And I love that someone here knew where to find such grips! LOL GOTTA see a picture!!!
So, I have to ask, does anyone else here remember the toy plastic guns that were a copy of the Whitney Wolverine the FIRST time the real guns were around? You loaded them with colored rubber balls which you pulled off of a branch of them through a sliding gate on top IIRC. And/or maybe they fired little flying discs like 45 record middles you'd use on the 33 spindle of something called a record player. Either way, they shot a few feet -- lol. They were cheap when Made In Japan MEANT cheap, and hung in a blister pack on a hook in every store that sold ANY toys. This around the time when the OP was probably serving in SE Asia...
This above all: to thine own self be true, And it must follow, as the night the day, Thou canst not then be false to any man.