Loading... Please wait...

 Your state may restrict sale of firearms, ammo or magazines              Please read "Before You Order". 


Surplus Ammo Newsletter

Magpul ACS Collapsible AR-15 Buttstock - Mil-Spec

  • Image 1
  • Image 2
  • Image 3
  • Image 4
Your Price:
$89.99 (You save $45.01)
2.00 LBS
If this item can be added to shopping cart, it is in stock.
Calculated at checkout

Product Description

Magpul ACS (adaptive Carbine Storage) AR-15 Collapsible Buttstock - Mil-Spec  

The patented 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. Similar to the Magpul CTR®, the ACS also features a supplemental friction lock system that minimizes excessive stock movement 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.


  • 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)
  • Sloping cheek weld provides a wide contact surface for user comfort
  • Two water-resistant battery storage tubes located on the left and right sides of the stock
    • 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
  • Storage compartment in tail of stock with positive latching access door on right hand side
  • Supplemental friction lock minimizes accuracy robbing wobble*
  • Shielded release latch prevents snagging and accidental operation
  • Premium chrome-silicon lock spring provides positive locking and long service life
  • 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
  • Sling Mounts
    • Mid - Optional QD Swivel Sling Mount fits up to 1.5" push-button swivels
    • Rear/Bottom



  • Weight: 0.89 lb.
  • Weight, w/ Rec. Extension: 1.14 lb.
  • Length, Maximum: 7.95 in.
  • Width, Maximum: 2.58 in.
  • LOP Adjustment Range: 3.25 in.
  • LOP, M4 Collapsed: 11.75 in.
  • LOP, M4 Extended: 15.00 in.


Find Similar Products by Tag

ACS  ar-15  ar15  buttstock  magpul  mil  mil-spec  Milspec  

Find Similar Products by Category

Write your own product review

Product Reviews

  1. Much better than an m4 5 Star Review

    Posted by on 10th Dec 2012

    The storage compartments make for nice cheek rest, good grip with the rubber pad, and another thing to add, it adds some length to the rifle. Check the measurements for exact size diff, but I think its about and half inch...maybe more. Don't have it in front of me to measure right now.

  2. Versatile and strong 4 Star Review

    Posted by on 9th Nov 2012

    For my first build I chose this unit because of the utility. After firing the rifle I realized it makes shooting easier, the rubber is nice. It is very stable when locked.