With the "pixie hat" shapes on, last thing to do is sort out the very end of the barrel.
The gun has two distinct things going on with that - there's how it appears in the forest scenes, with a closed off end and a small spigot thing going on.
When Blake is inside the base though, the ends been cut off to allow for the explosive charge to be fitted, making a large bore barrel affair.
I decided to go with the first version as it meant i didn't have to go to the trouble of cutting the end off.
But what to use for the spigot?
Thanks to top bloke Phil Stevens i now know its a shape that was inside the rear tube of the gun that held the D batteries in place.
Trouble is, the newer release of the gun, which i have, diesn't use D batteries in the main part but one 9 volt one in the grip.
So, no shape.
Instead, i've gone for an approximation, cutting down one of our daughters felt tip pins, which looks to be about the right diameter, and has a bit of detail at the end.