Maybe this is old news, but found a local fellow's site which has scans of some charming old gun magazine ads and articles.
http://www.mouseguns.com/blast/blast.htm
This one is a favorite:
http://www.mouseguns.com/blast/bigguns.gif
I would buy the semi-auto 20mm anti-tank rifle rather than the 25mm cannon, because it is doubtful that the 25mm cannon would fit thru the fence gate at the range. The ad copy is well-written and funny.
http://www.mouseguns.com/blast/blast.htm
This one is a favorite:
http://www.mouseguns.com/blast/bigguns.gif
I would buy the semi-auto 20mm anti-tank rifle rather than the 25mm cannon, because it is doubtful that the 25mm cannon would fit thru the fence gate at the range