For extra long missions or scenarios when you need all the carrying capacity you can get, you better turn to the Magupl ACS buttstock as your replacement stock of choice. This Adaptable Carbine Storage buttstock features two waterproof battery tubes accessible from the rear of the stock, but the storage options don't stop there. The Magpul ACS also has a larger storage compartment that makes up a significant portion of the stock and can be used for a wide variety of storage options. Precision length of pull adjustment is still present in the Magpul ACS stock series, and an anti-snag design and an enclosed release latch ensure the stock doesn't snag even when you're wearing body armor. Better ensure you have all the gun parts you need right at hand with an ACS stock, and now you can get one at a steal direct from Webyshops. If you're still not certain, don't forget free ground shipping comes standard on all qualified orders as a bonus to you. Receive FREE Ground Shipping on all orders over $39.99.