I broke out the dremmel and de tuned the sharp edges around the end of the magtube and the bullet cutout with some diamon burrs then used the same to thin out the rather crude front sight. It now has a pretty decent bead wich I prefer. loosing the hood improved the front sight picture as well for me.
The hood is kind of pointless given that the front sight is fixed and integral to the barrel band..... not like it's going to get knocked loose!
Then I opened up the notch a bit on the rear sight and rounded it to match the front bead.
Since I was hitting a bit right of point of aim, I loosened the set screw on the rear sight and drifted it a bit to the left. After moving it a little to the left and re tightening the tiny set screw my rear sight now has a fair bit of play in it. The rear sight set up is not that impressive.... I've got a pretty low rimfire groove peep sight that I can try, it will be a bonus if it works with the front sight but I see a micro red dot as the only sight needed.
I found a couple of good off hand holds that stabilize the rear of the grip nicely and see no need for a traditional butt stock.
One hold is a push (fore grip) Pull (pistol grip) with the rear of the birds head touching against the cheek/jaw similar to an archery pull and release position. This hold will be made easier with a QD sling cup embedded into the back of the birds head and a bungee sling attached.
I'm going to place the sling cup so It's inline with where I'd want a stock to connect with my chest and then rig a shaft to a QD socket for a takedown stock.....

A short branch or other similar object can be used as a make shift brace that gives good stability as well.
The other hold I found stable was similar to this guys position, but with the front hand coming around the back of the birds head and pulling it forward... it all tucked in rather nicely and was quite stable. The trigger breaks pretty clean but it's a bit heavy and could loose a bit of weight.
This is going to be a great grouse blaster!