This is a W.J. Jeffery, .333 Express take down magazine rifle, which has the old King St., London address. The receiver, trigger guard and floor plate are fully engraved. The Lyman peep sight is dated 1894 and patented 1904. It has 4 folding and 1 fixed rear express sights. The front sight cover pivots and can be removed. The rifle I've been told was mfg. around 1908, but have to get the letter for it, which I've been neglecting for a very long time. The company has been in business since the 1800's to the present.
These rifles were and still are popular when used for hunting dangerous game like tigers in India and lions in Africa. The .333 Jeffery ammo is very difficult to locate and is very expensive, but every so often Kynoch comes up with it. I've shot it in the past and still have some ammo remaining, but it's now retired like myself.
The custom rifle makers like Holland & Holland in England love using the German '98 Mauser actions and the combination of both are unmatched. These rifles are all special ordered by their customers and are even fitted to the individual shooter. They're all beautiful rifles, but the cost is obscene unless you're very wealthy.
Hooooollllllyyyyy Craaaappppp, that is an amazing rifle.
I'm gonna stop you right there, you just said an AR-15 is a high-powered rifle. It is obvious you don't know anything about guns and I shall ignore anything you say from this point on.