The KAC rail is a $300-$400 part if you buy it new by it's self. When you starting doing the math on this with the SOCOM heavy barrel, side sling mount, Matech rear sight (which is a very, very, good BUIS), and the KAC rail, what you are left with is a rifle that cost the same as the base 6920 with $500-$600 worth of extra parts.
I ordered one at yesterday after they posted the deal on their facebook.
$899 shipped??? it's an incredible deal.
These thing used to run for $1500 not too long ago.
The beauty of this particular deal is it comes w/ Knights Rail instead of Troy drop in rails.
A lot of SOCOM during the last year or so came with Troy rails.
Ambi sector, M4A1 marked lower, mid-heavy barrel, Knights rail..... all for $899 shipped and no tax? you just can't beat this deal.
Get one before the "storm"...