Has anyone had any experiences with one of these?

The Airow Gun – where pellet gun meets archery. So load it up… and blow it out your bow!

Send a .22 Cal pellet an impressive 675 fps based on using a 70 lb bow at 29" draw. Mounts to most compound and recurve bows with aluminum risers.

The Airow gun converts your bow to the most unique pellet gun in the haunted forest. It’s perfect for year round plinking, scouting trips or while hiking up your own yellow brick road. Great for killing time… or wackin’ any varmint that happens across your path. Sure…there may be no place like home, but now it’s time to put away the quiver and enter a whole new dimension of outdoor fun.

http://www.airowgun.com/pellet.php