You can see a good number of them on
Soldier Systems Daily
http://soldiersystems.net/2016/11/16/black-fridaycyber-monday-2016-sales-list-sponsored-by-tactical-distributors-2/
The Firearm Blog
http://www.thefirearmblog.com/blog/2016/11/23/black-friday-2016-gun-deal-roundup-poll/
Brownells
L6H: $25 free shipping
L6J: $10 off $100 + free shipping
L6K: $25 off $200 + free shipping
L6L: $40 off $300 + free shipping
LBT
http://lbtinc.com/bfcm16
