[Shortening Benelli hollow stocks]

It's pretty easy.  Especially on the non comfort tech stocks.  I cut one down to about 12.5" LOP.  I cut the stock and then ground an insert to fill the void and attach a new recoil pad. The insert is held in by machine screw at the top and the bottom of the stock.

[SBE II barrel]

My SBEII isn't drilled and tapped. It's about ten years old if that means anything.

[M2 question]

Thanks for the answer truckcop.

[M2 question]

I currently own a SBEII and an M4, and I'm considering adding an M2 to the mix. Are all M2 receivers drilled and tapped for a picatinny rail? I'd like to get the 21" field version, and add a 26" barrel for bird shooting. In the off season I'd like to run the shorter barrel and add some sort of sight to it. Another option would be to pick up a tactical version and run the 26" on it to bird hunt. How easily is the rear ghost ring sight removed? Any opinions on these options?

[pattern master or wad wizzard?]

I would reccomend giving ballistic specialties a call. They've helped me set up my shotguns, and they work very well.