I think 16 is a good way to go simply because you can reconfigure your rifle anytime you want to without the hassle of removing a pinned and welded flash hider. Also, who knows what stupid laws could be coming our way. If scary looking flash hiders are illegal, we'll have to deal with that. For the 1.5 to 1.6" difference, it's hardly worth the trouble.
“I predict future happiness for Americans, if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.”
Thomas Jefferson
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