Juan, Magpul normally includes the length in the model number which is 13 inches. Seems right as this covers 17 Picatinny rail slots. I would verify this with Magpul at Phone: 877-4MAGPUL 10:00-6:00 CST, M-F or by email contact here : magpul.com/about-magpul/contact

I could not find this info listed I suggest you call Magpul and ask Phone: 877-4MAGPUL

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Hi Juan, Unfortunately there's no info on length anywhere I've searched. I know each panel fits one side of a carbine-length rail (18 slots) so guessing 18 inches.