Mangalore Grenade

Fifth Element fans will know what this is, and that there are a small number of very nice machined aluminium replicas in circulation that sell for around US$400. Here's a cheap alternative.
Google Image the name and you'll find lots of photos of both the replicas and the original prop - mostly on The RPF site.
Note that to complete it you will need to acquire a black Maglite Mini (AA batteries, not AAA)(getting harder to find in stores, but still available if you look) and the cute little vernier knob on the nose. Sadly the latter is a now-obsolete RS Components product, stock no. 509-973. I had the good fortune, just as I started looking, of finding a collector on The RPF website selling his spare.
(For those of you less fortunate, I've also done a printable version of the knob as a separate 'thing'. Search for the cunningly-named 'Mangalore Grenade Knob'.)
You will also need a short length of fluoro red acrylic rod, 1/4inch diameter, to make the four little lights around the mi