Walther CP99

[00111001]

If you cut down the barrel of an air rifle, you could fill the barrel with the metal BBs, with a little plug of tissue in the end to keep 'em in place

I used to do this when messing around with the sawn off air rifle we had - gives a nice spread, and stings like buggery (not that I know how buggery stings) from a fair distance. Certainly in a house it'd make an intruder stop in their tracks.