Apparently because I'm an idiot.
The build I have weighs about 14 LB. The M-11 is supposed to remove 60%+ of felt recoil but I still get "jump" even when I hold the hand guard.
Others at the range just squeeze the trigger and their firearm remains still. So I thought, easiest/cheapest thing add weight.
Other alternatives (new stock, different barrel, different hand guard, different muzzle break) all have additional cost and my budget is about tapped out.