{"product_id":"magpul-acs-carbine-ar-15-stock-mil-spec-mag370","title":"Magpul ACS Carbine Stock Mil-Spec for AR-15\/M4","description":"\u003cp\u003eThe Magpul ACS is a mil-spec carbine stock with dual onboard storage compartments for AR-15 and M4 rifles, fitting any Mil-Spec-diameter receiver extension.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe self-contained carbine stock — the ACS locks down like a fixed stock and carries like a supply cache.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Magpul ACS Carbine Stock (MAG370) — Adaptable Carbine\/Storage — pairs a friction-lock system that clamps the stock rigid against the receiver extension with dual water-resistant storage compartments in the cheek housing. The result is a collapsible stock with fixed-stock stability that also keeps batteries, spare parts and small mission essentials sealed inside the rifle itself.\u003c\/p\u003e\u003cp\u003eThe wide, contoured cheek weld surface supports precise work behind optics, the rubber buttpad plants in the shoulder, and sling integration covers loops and QD alike. For duty rifles and go-bag carbines that must be self-sufficient, the ACS remains the most complete stock Magpul builds at this weight.\u003c\/p\u003e\u003ch3\u003eWhy shooters choose the ACS\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriction-lock system\u003c\/strong\u003e — wobble-free, fixed-stock stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual storage compartments\u003c\/strong\u003e — water-resistant onboard supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide contoured cheek weld\u003c\/strong\u003e — excellent behind magnified glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive sling options\u003c\/strong\u003e — loops and QD-ready\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree finishes\u003c\/strong\u003e — Black, Flat Dark Earth, Olive Drab Green\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat the ACS fits\u003c\/h3\u003e\u003cp\u003eFits AR-15\/M4 rifles running a Mil-Spec-diameter carbine receiver extension (buffer tube). A commercial-spec tube is a different diameter and will not take this stock, so confirm your tube specification before ordering. Slide on, set length of pull, engage the friction lock — then load the compartments and forget them until needed.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eAR-15 \/ M4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eMil-Spec carbine receiver extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eCollapsible carbine stock with dual storage compartments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack, Flat Dark Earth, Olive Drab Green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdjustment\u003c\/th\u003e\n\u003ctd\u003eFriction lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMagpul Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMPN\u003c\/th\u003e\n\u003ctd\u003eMAG370-BLK · MAG370-FDE · MAG370-ODG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cp\u003eStability, storage, sorted. \u003cstrong\u003eOrder the ACS today\u003c\/strong\u003e — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExplore more:\u003c\/strong\u003e \u003ca href=\"\/collections\/rifle-shotgun-stocks\"\u003eRifle \u0026amp; Shotgun Stocks\u003c\/a\u003e, \u003ca href=\"\/collections\/precision-rifle-stocks\"\u003ePrecision Rifle Stocks\u003c\/a\u003e, \u003ca href=\"\/collections\/ar-15-parts-accessories\"\u003eAR-15 Parts\u003c\/a\u003e or browse all \u003ca href=\"\/collections\/magpul-industries\"\u003eMagpul\u003c\/a\u003e.\u003c\/p\u003e","brand":"Magpul Industries","offers":[{"title":"Black","offer_id":60873787179342,"sku":"MAG370-BLK","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"Flat Dark Earth","offer_id":60873787212110,"sku":"MAG370-FDE","price":115.0,"currency_code":"GBP","in_stock":true},{"title":"Olive Drab Green","offer_id":60873787244878,"sku":"MAG370-ODG","price":115.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1081\/3223\/7646\/files\/magpul-acs-carbine-ar-15-stock-mil-spec-mag370-black.jpg?v=1789881030","url":"https:\/\/onyxarmaments.co.uk\/products\/magpul-acs-carbine-ar-15-stock-mil-spec-mag370","provider":"Onyx Armaments","version":"1.0","type":"link"}