You will not be disappointed! These lock into the barrel nut with the top and bottom rail and the front of the top rail has an additional spring clip that really locks into the end cap. Once everything is in place it’s extremely solid. The B&T vertical grip really completes the package as well. It’s aluminum and very precisely machined. I placed ERGO rail covers on mine and they fit perfectly. Surefire scout and the B&T vert grip fit perfectly as well.
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