FB is not the center of the universe when it comes to firearms related items being on sale. First, it is against FB policy to market, sell, buy firearms. Second, if a business does figure out their way around the algorithms which FB uses, eventually the FB police will catch up to them.
I would (naturally) suggest my page as a place to find deals everyday. Beyond that, my customer service is beyond any satisfaction you will receive from saving $20 at Dicks, for example.
https://cardinalguns.comFinally, Google is your friend...
_________________"To compel a man to furnish funds for the propagation of ideas he disbelieves and abhors is sinful and tyrannical." - Thomas Jefferson