Great for the $$$ - TacFire M-Lok Rail Handstop

Fits hand perfectly for firing from the hip with 12 gauge When shouldered, I cheat my index finger to the front of it and it runs great.
Only thing I like about it is the mlok screws, I have a couple finger stops from the same company that use a T25 but which are solid. This uses a 2.5mm or 3mm hex screw. Still works, just be careful when you torque them down.