IMHO Spuhr is the most robust out there and pretty high $$$. KAC's bolt-on mount will get the job done for less $. As far as QD, Bobro is the best for fit and repeatability in my experience. Good luck with your build(s).
Let's go shooting,
Hammer
"When the people fear their government there is tyranny; when the government fears the people, there is liberty. The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." – Thomas Jefferson
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