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Extras are just options. Windows or no windows, long blade short blade? It's good because you can make the saber too suit your fencing style. And your Character. Makes it more u unique i like the options too choose from. My new one is the Butcher and it has real weight and a menacing pronged hilt like a spear with the blade out. I Love it. Feels like a weapon too wield.

Ultrasabers are highly customizable. So you can go with many changes to the "stock" design based on your desires and price range. Each page on the ordering process gives you details on what options are available, and you can easily navigate back to previous options if you change your mind before adding an item to your cart.

What extras are you looking at? Stanes, extra blades, covers, etc?

If you're buying more than a stunt saber and anything from their high-teir hilts, go somewhere else. Their electronics and wiring are typically shoddy and unorganized and most other major retailers have better builds for sound and lights.

Join saberforum.com which is US's forum. Lots of people with lots of UltraSabers. That's where I found out exactly what the choices meant before ordering mine.