That is what I have.
Love it. Cost only a few cents each time I use it.
You can go into cabbalas, bass pro etc.. and get shotgun primer shells without any problem.
http://blankfiringgrenade.co.uk
The guy is honest. He lost my first one. Sent it.. but the mail lost it. so he refunded my money and sent me another at no cost.
Can't ask for more than that.
Cheers