It isn't in and of itself, but the technology needed to make your basic musket, decent metal work, carving, springs, etc. etc. are made entirely obsolete by the fact they can have outboard motors.
There's a composites industry, and a decently large and advanced engineering industry in order for that item to exist. An assault rifle, even an M-16, is much simpler machine than an outboard motor. I've seen scaffolding, so they can make long metal rods.
Everything needed to produce weapons of a modern caliber is present.
Hell, find me enough uranium and I could make you a nuke with their tech.
Charlie Tunoku is a lover and a fighter.