Loading... Please wait...
PMAG SALE! Buy 7 Mags Get 1 FREE on select Magpul Magazines
  • Magpul ACS Stock - Black
  • Magpul ACS Stock - Flat Dark Earth
  • Magpul ACS Stock - OD Green
  • Magpul ACS Stock - Foliage Green
  • Magpul ACS Stock - Stealth Grey

Hover over main image to zoom

Magpul ACS AR15 Stock

$89.95 $78.18

(You save $11.77)


Related Products

Customers also viewed

Product Reviews

Write Review

  1. Awesome Product!!

    Posted by Michael Longman on 11th Dec 2014

    This is a great stock and I'm really pleased to have gotten it

Magpul ACS Rifle Stock

The patent-pending Magpul ACS (Adaptable Carbine/Storage) – Mil-Spec Model is a drop-in replacement butt-stock for AR15/M16 carbines using mil-spec sized receiver extension tubes. A streamlined, anti-snag profile shields the release latch to prevent accidental activation and the extra-power lock mechanism uses a premium chrome-silicon spring to avert auto-collapse failure by resisting spring relaxation. Similar to the Magpul CTR™, the ACS also features a supplemental friction lock system that minimizes wobble* for enhanced weapon stability and accuracy. Dual, rear accessible, water-resistant battery storage tubes and an integral storage compartment in the butt of the stock provides multiple storage options. The ACS comes standard with a 0.30" thick rubber butt-pad which provides positive shoulder purchase to prevent slippage even with body armor or modular gear.Made in U.S.A.
Magpul UBR Stock Features:
      • Mounts on mil-spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, S&W, LMT, and others (please see the note below)
      • Supplemental friction lock minimizes accuracy robbing wobble*
      • Premium chrome-silicon lock spring provides positive locking and long service life
      • Sloping cheek weld provides a wide contact surface for user comfort
      • Shielded release latch prevents snagging and accidental operation
      • Replaceable 0.30" Rubber Butt-Pad offers an anti-slip surface and increases impact protection
      • Compatible with Magpul ASAP® and other receiver-mount sling attachments
      • Metal strike plate provides a hardened striking point on toe of stock
      • Two water-resistant battery storage tubes located on the left and right sides of the stock
        Storage compartment in tail of stock with positive latching access door on right hand side
        • Each tube will store up to three CR123 lithium or two AA batteries
        • Tubes are accessible from the rear via a tethered, hand-removable rubber plug
      • Sling Mounts
        • Mid - Optional QD Sling Mount accommodates up to 1.5" push-button swivels (NOTE: QD Sling Mount Sockets are sold seperately.)
        • Rear/Bottom - 1.00" sling loop
  • Optional Accessories**
    • Extended Rubber Butt-Pad, 0.55"
    • Enhanced Rubber Butt-Pad, 0.70"
    • Push-button QD Sling Mount Sockets


    • ACS, Mil-Spec Carbine Stock (w/ Rubber Butt-Pad, 0.30")
      • Weight, Stock: 0.89 lb.
      • Weight, w/ Rec. Extension: 1.19 lb.
      • Length, Stock: 7.95 in.
      • LOP Adjustment Range: 3.25 in.
      • LOP, M4 Collapsed: 11.75 in.
      • LOP, M4 Extended: 15.00 in.


    NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec. If you have a commercial-spec extension on your rifle, make sure to order the Commercial-Spec ACS. Please see the "Comparison" section by clicking here if you do not know what receiver you have.
Product Specs:

Magazine Capacity
Gun magazines that hold more than 10 rounds are considered to be a high capacity magazines and will not ship to the following states: CA, CO, HI, IL, MA, MD, and NY. We will ship magazines with a capacity of 15 rounds to New Jersey.

Gun Parts USA does modify these mags to ship into restricted capacity states. Please check our website for magazines for your state requirements. Orders received that are not legal in your area will be canceled. Posting of High Capacity Magazines on our website does not constitute offering them for sale in restricted capacity states due to our shipping restrictions.

Optics/ Red Dot Sights
Optics are delicate by nature and can be damaged easily and without effort. Gun Parts USA wants to make sure all our customers receive a new, trouble free optic which is why we strictly enforce a no return policy on electronic items and optics. No returns or exchanges allowed on Eotech products or any electronic and/ or optic. Rest assured that as our customer you will not receive an item that may in some way be damaged by another customer. We cannot ensure a products integrity once it has left our facility and will not sell an item that may have been compromised, dropped or damaged to another customer. Should a problem arise with your product consult the manufacturers warranty.


Why Buy from Gun Parts USA?

Flat Rate Shipping

Only $7.95 Shipping any size order within the lower 48 states. Alaska & Hawaii slightly more.

No Bull

We treat our customers as we would want to be treated, with Dignity & Respect.

Knowledgeable Staff

Our staff are avid sportsmen and shooting sports enthusiasts with years of knowledge.

30 Day Return Policy

We Offer a full 30 day, Easy Return Process on most new products.

Secure Shopping

Safe & Secure website with 256 bit Secure Socket Technology that protects your sensitive data.

Text Deals

Get special deals and events sent directly to your mobile phone.

Huge In Stock Inventory

We offer a huge inventory with multiple warehouses for shipping. We get you your product fast.

Low Everyday Prices

We offer low everyday prices complimented by our weekly special deals.

Win Cash Rewards

Submit reviews for the products on our site and enter to win up to $100 in our monthly drawings.