I just finished a head to head comparison of the M4 and M2. I shot 30 slugs through each. The M4 had a pistol grip, the M2 had a comfort tech, traditional stock. I could barely tell the difference in recoil, and given that the M4 weighs a pound or so more, it should recoil less. Maybe. I would say I still prefer the M2.
As far as stocks go, I'm curious what you guys think about pistol grip stocks vs. more traditional stocks, on shotguns. Alot has to do with where the safety is located, but overall, I prefer a more traditional stock. The magpul is tops, if your gun accepts it. Also, I pretty much only shoot full power slugs. I don't think the recoil characteristics of your preferred stock mean much shooting loads that don't recoil much.
So, what stock style do you like and why? Which model gun and stock? Safety mods to make it work?