The Magpul ACS (Adaptable Carbine Storage) Stock has a non-water proof compartment on the right lower side of the stock. At the top of the stock there are two water-resistant compartments; one on the top right and one on the left, ideal for battery storage. Kit includes a 6 position milspec buffer tube, castle nut, stock plate, carbine buffer and spring. Buffer upgrades available. Available in Black, Dark Earth & OD Green.

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