Thanks man, yeah the Thompson was pretty fun to create. I saw the KRISS stock and was hey wait a second that kind of looks like a skeleton of the Thompson stock and if you put the KRISS stock where I put it and then put the thompson stock over it you'll see that they match perfectly.
Just like some of the different good ideas bullpup weapons. Downward ejection, ambidextrous, streamlined from p90, form and quick change barrel of steyr AUG and pivoting barrel grip.
5.56mm rifle. The rounds would be staggered in the magazine forward by 45-60 degrees using a ramp shaped magazine platform. This would reduce the width of the rifle. It would also minimise the rotation of the round coming out of the magazine into the chamber.
Ejection would be downward where the AUGs original mag would seat.
Also, the barrel grip would pivot like normal but instead of pulling down to unlock, it clips into place using a latch system. Inside the barrel grip would be something like a grip pod.