
A bit sad...
I seem to remember (doubtless a quick google would confirm, but I can't be arsed) that the creator of Lego decreed that there should be no weaponry with Lego models. (Which was subsequently watered down to "no present century weaponry", so swords, lightsabres, etc in kits are OK....)
I'm not just saying this as a doogooder, I'm pointing it out because aged 10 or thereabouts I made a Lego crossbow that could fire a rail track about 20 yards, then stupidly checked the mechanism by looking down the "barrel" while forgetting it was loaded... cue trip to A&E, nearly lost sight in one eye, and have been bespectacled since.... I'm sure it's karma or something...