I imagine you are talking about changing the recoil impulse rather than lessening the recoil. I had a problem with my Sport wanting to drop the muzzle and my CTR stock was smacking my cheek in an unpleasant way. Nothing terrible but I didn't like my teeth chattering.

I installed a Spikes T2, Cheap YHM muzzle comp and the extended magpul stock pad. The stock pad alone made it so the CTR stock wouldn't move upwards on my cheek and the T2 / YHM brake combo helped even more.