12 gauge laser boresighter?

[Jayhawkeye]

please recommend a good laser boresighter compatible with a 12 gauge.  thanks.

[JPD298]

I just purchased a Firefield laser boresight from Optics Planet for $25, it looks like a 12 gauge shell.  Used it to bore sight the FFII I added.  Started at 20 yds, and it was only off a hair.  Made a slight adjustment on the FFII, and she was dead nuts at 40 yds in about 3-4 shots!!

http://www.opticsplanet.net/firefield-223-rem-laser-bore-sight.html

[Jayhawkeye]

thanks.