Grant… I’ve been considering having you do the same thing for me. But I’ve been tossing around the pros/cons of using a 10", 11" or 12" Larue rail on the Colt 6720. Thoughts on these different lengths for a general purpose defense gun? Right now, I’m thinking of using a DD fixed front sight, and not sure which weapon light. I don’t want the gun to be too front heavy, and want it light.