I Wear This Gun For Protection From Deadly Ducks
From Fashionably Geek: Besides looking cool, keeping a NES light gun tucked away in the back of your jeans will keep you safe from any duck gangs that might try and do you harm.
Product Page ($20)
Alien Invasion Shooting Game: Defend Your Desktop
Details are scarce on this Alien Invasion Shooting Game, but it appears to involve laser light gun gameplay that is similar to this Gangster Shoot Gallery. So be prepared! E.T. is due to attack your desktop on August 31st.
Product Page (£25 or $47)