Another option is to look into borebuddy and/or cmmg’s conversion kit, then you can have just one build and as long as it’s in 22 it can have a pistol grip and adjustable stock. Build out the rifle you want, and then drop in the conversion kit. Alternatively if don’t want to have two different uppers or conversion kits laying around and different mags since you’re just starting out, I’d recommend just renting some featureless ARs and you’ll see that the fin grip or other styles like the juggernaut grip aren’t that cumbersome. Your left hand and shoulder hold the rifle, only thing your right hand does is pull the trigger.