The Magpul Industries B.A.D. Lever is designed to work in Mil-Spec AR15 receivers. Since dimensions and specifications of AR10's vary the fitment of the Magpul Industries B.A.D. Lever in a PSA AR10 cannot be guaranteed.
Yes, it fits
(Most) of PSA upper will not except the bad lever. No relief cut out in upper. So it rides against the bolt. And all of psa bolt stop release's are straight. Resulting in the bolt dragging on the stop. Some of PSAs stuff that I have received was downright dangerous to shoot.