For Rifles :
Install a Limbsaver recoil pad and a Muzzle Brake. Holland's is the most efficient...with this combo you can shoot most mags wearing a t-shirt and have the recoil of a 223/243 range.
Limbsaver recoil pad + back bore and lengthen forcing cones in barrel.
Mag-Na-Port is still the King of reduction
We offer all of these services !