The Gunners signed Danny Welbeck and Alexis Sanchez in the transfer window, and Walcott believes that the pace of the pair alongside his own will give the club the quickest frontline in the Premier League.
He told The Mirror: "I hope we'll have the fastest forward line in the Premier League. It's exciting times.
"These players are very, very fast. They will fit the bill perfectly. Alexis has settled in very quickly, Danny is a good guy, I have worked with him with England. Danny is a hard worker. He always puts his heart on the line.
"What we can do is build on from the FA Cup [win] and attract these great players to the club. It will hopefully put Arsenal where we should be – winning trophies."
Sanchez arrived from Barcelona for around £32m back in July, while Welbeck signed on transfer deadline day for £16m from Manchester United.