Another +1 for the PEPR. I'm not a huge fan of QD mounts, once I mount something, I try not to move it. However when testing new sights and scopes that come in we need to bump things around quite a bit and the PEPR QD has worked pretty well at a very close return to zero. Like strogpoint said, for under $100 for the perm. or just over $100 for the qd, its a nice choice.