You also gotta take in the fact additional equipment (Hand Grip), Gun design (Bullpup/ standard) and Barrel type (Anti Recoil[.50 cal barret]).recoil =
where Ir is recoil
Vo is velocity of projectile
Mp is mass of projectile
and c is powder charge
very rough equation, doesnt take the weight of the weapon into account or the action or anything
but weight does play an important part and light guns have more recoil than heavier ones.
m4 etc projectiles are 63gn at ~900m/s with like a 23gn powder charge, same with pretty much every assault rifle used these days
I was more aiming at the weight issues for women picking them up, but with training and with small bursts instead of complete auto shenanigans, women can use the rifle.
Just dont be the fail lady i saw on youtube who didnt use the gun stock with a rifle scope.