My reasoning behind this project was to get a shorter rifle, SBR, but without a tax stamp and using my existing 15-22 without destroying it. Right now I can change from my standard MOE -15-22 to the Bullpup lower in seconds using the takedown pins. All of my furnature is on QD mounts except for the iron sights and the reason you see them in the photo. It is obvious that they are useless on the Bullpup but in seconds they are usefull when changed back to the 15-22.
As for some have noted about a shell over the lower, this can't be done without destroying the factory lower. Our lower has a fixed buffer tube which would have to be cut off for this to happen, which would violate my primary goal.
The forward grip is a natural angle, just a little high and will change some. I had thought about adding a rail where the grip is but I have concerns. I think it is a good thing to stay away from the business end of a rifle. I also think putting a vertical grip at the front would be an un-natural grip and uncomfortable, but am still exploring it as well as other options like an adjustable grip.