Ivarforkbeard is mostly correct. The pattern room guns, all of the pieces detailing small arms development etc were moved to Leeds along with the Royal Laboratory collections. the big stuff went to Fort Nelson. Fort Nelson but unfortunately not Leeds was part of my tour, so good things are a coming. Please do not consider my criticism of the Tower to be that of the British generally, what I would like you to do is consider how the Tower presented its history and exhibits in contrast with Fort Nelson and just as importantly the Musee' d Armee' in Paris which I can also show later.
The next installment however will be Portsmouth Dockyard which includes HMS Warrior, HMS Victory, the Royal Navy Musuem and the Mary Rose Exhibit.
HMS Warrior
The brass tracks are what the bow chaser gun had to follow to avoid shooting off the flags.
110 pdr Armstrong Breech Loader
Detail of the firing mechanism
Small broadside gun, top deck
If you like what you saw, consider this. Everything you just saw is Fibreglass and plastic. Not one real gun among them. There is a genuine 110 pdr below decks and wrapped in canvas. The real deck guns (there were only two) are covered as well.