That's perfect. You should be able to pin and weld to 16.1x". My dedicated suppressed rifle is exactly the same, but I used the SF muzzle brake instead of the Warcomp. I like it so much I'm building a 14"bbl + Warcomp for a compact non-NFA build. The 16" Optimum rifle just got a 1-6 LPVO, and the Aimpoint that was on it is moving to the new 14" P&W. The 14" & 16" barrels are only .3 ounces different, which leads me to believe the 14" barrel is "stouter". That's definitely not a bad thing when you're dealing with heat.
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