Thanks for the replies, some valid and interesting points. My only reason for considering an m4 is I am concerned about throwing a mag extension and a side saddle onto my m2. I have never had any malfunctions out of her and I wanna keep it that way. Apparently with an m4 I can bolt on a mag tube, side saddle, 15 power leuopold optic, satellite receiver, 2 bayonets and throw an auto sear in her and she won't miss a beat. As far as mil spec goes, most active duty and prior service folk are aware that just because uncle sam issues ya hardware it may not always be the "best". (Although this probably does not apply to Benelli he he he.) Just look at the Bradley. It was designed from the ground up to be mil spec and it is. It's still a piece o' junk. (mostly)
Does anyone have an m2 configured with the mag extension and side carrier? If so, let me know how it runs.
Thanks for the replies everyone. B4