Question: what is the difference between benelli m2 and m4?
Answer: 1- The M4 (7.8 lbs) weighs 1.1 lb more than the M2 (6.7 lbs). Of course weight cuts both ways - heavier: reduced recoil but heavier to carry/manipulate etc., lighter: heavier recoil but slightly easier to carry/manipulate. 2- The M4 is gas operated, the M2 uses Benelli's inertial system.