Just got an email from Sig. They have pinned and welded 16" (14.5") uppers with flash hider on sale for $799.99. Regular price on these are $1,299.
https://www.sigsauer.com/pinned-and...omplete-16-in-semi-special-configuration.html
https://www.sigsauer.com/pinned-and...omplete-16-in-semi-special-configuration.html