What is this shotgun attachment?

Factual Questions
1

This pic is from Eric Rudolphs proceedings today.

It’s obvious its a shotgun but what is the attachment below the end of the barrel?

2

Looks like a torch light to me.

3

It’s a light, probably a Surefire brand flashlight.

4

Possibly one of these numbers:

http://www.surefire.com/maxexp/main.pl?pgm=co_disp&func=displ&sesent=00&carfnbr=124

5

Thanks for the responses. Looks like it to me too.

What boggles me is the prices. They are obscene.

6

Torch, flashlight… torchlight… you Yanks are spoilling my British English language education!!! :smiley: