Halloween Sale Is On! | Shop Now

Magpul ACS Carbine Storage Stock – Mil-Spec AR-15 – MAG370

Out of Stock
Orders will Ship within 1 Business Day
Backed by Magpul Warranty!
TOP ADD-ON'S
Magpul MOE-K2+ Pistol Grip - AR15/M4 - MAG532

Magpul K2+ Rubberized Pistol Grip - Black

$23.70
Magpul MOE M-LOK Handguard - Mid-length - AR15 - MAG426

Magpul MOE M-LOK Midlength Handguard - Black

$35.10

Delivers Excellent Performance With More Functional Design

The Magpul ACS Carbine Storage Stock – Mil-Spec is a top-notch drop-in replacement buttstock for AR15/M4 carbine rifles that utilize mil-spec sized receiver extension tubes. Designed with dual, rear-accessible compartments, you can store extra batteries and other accessories that you may need during tactical operations.

Similar to the Magpul CTR, the Magpul ACS Carbine Storage Stock – Mil-Spec also features a streamlined anti-snag release latch to prevent accidental activation along with a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability and accuracy.

Magpul ACS Carbine Storage Stock - Mil-Spec AR-15 - MAG370

Dual Rear-Accessible Storage For Accessories

The Magpul ACS Carbine Storage Stock – Mil-Spec is an advance and more functional approach when it comes to upgrading your buttstock on your AR-15 Rifle. The dual, water-resistant battery storage tubes and the integral storage compartment in the butt of the stock can provide multiple storage options. The storage may also help to keep your rifle well-balanced for better handling.

This Buttstock also has a sloping cheek weld that allows for comfortable shooting while at the range. It also includes a 0.3-inch Rubber Buttpad that allows easier shoulder transitions for increased accuracy.

Magpul ACS Carbine Storage Stock - Mil-Spec AR-15 - MAG370

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)
  • 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 the 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

Magpul ACS Carbine Storage Stock - Mil-Spec AR-15 - MAG370

Sling Mounts:

  • Mid – Now Includes the QD Swivel Sling Mount that fits up to 1.5″ push-button swivels
  • Rear/Bottom – 1.00″ sling loop

Optional Accessories:

  • Extended Rubber Butt-Pad, 0.55″
  • Enhanced Rubber Butt-Pad, 0.70″

Specifications**:

  • Platform: AR10, AR15, M4, M16, M110, SR25
  • Compatibility: Mil-Spec sized carbine receiver extension tube (not included) from manufacturers such as Colt, Armalite, LMT, S&W, and others
  • LOP – M4 Collapsed: ~11.6 in.
  • LOP -M4 Extended: ~14.9 in.
  • LOP – Adjustment Range: 3.3 in.
  • Length: max 8.0 in.
  • Weight: 14.1 oz.
  • Weight – w/ receiver extension: 18.1 oz.
  • Width: max 2.5 in.

NOTES:

  • 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 Magpul ACS Carbine Storage Stock – Commercial-Spec – MAG371.
  • * Friction lock performance may vary depending on the host receiver extension’s dimensional tolerances.
  • ** Specifications based on standard-length (flat-back) M4 Carbine receiver extension and may vary depending on tube manufacturer.

Products available on this page:

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Magpul Warranty Information

If you ever experience an issue with a Magpul product at any time, regardless of where it was purchased, please contact us directly and we’ll do everything reasonable to help you.

To make a return, please take the following steps:

  • BEFORE returning any products, please contact us first to receive an RMA number (Return Merchandise Authorization) and prominently write it on the outside of the package. Packages will not be accepted without an RMA.
  • Include a note with your name, shipping address, phone number and email, RMA number, and reason for the return (including, if applicable, information about the firearm, ammunition, and usage environment for defective returns). Do not send ammunition.
  • Wrap the item with quality padding and place it in the original packaging or in an appropriate box for shipping.
  • A UPS shipping label will be provided in your shipment. If using the original packaging, remove or cover the original shipping label. Tape the preprinted return shipping label to the outside of the box. Drop package at an official or authorized UPS drop-off location.
  • All refunds will be applied to the credit card used for the original purchase. You should allow one to two billing cycles for the refund to appear on your statement.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 7 reviews
100%
(7)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
C
Christopher Rigoli
Sharp and functional.

Processed, shipped and delivered smooth and quickly.

Stock is bulky compared to others but functional. Offers a nice cheek weld as well as battery storage and “loose ammo” storage. I like the look a lot main purpose for purchasing. Complements my rifle.

Thanks for sharing your feedback, Christopher. We're glad you're satisfied with your purchase. Cheers!

J
John Pierce
Big John

Love Magpul products

Thanks for sharing your feedback! We're glad you are satisfied with your purchase!

K
Kevin Lins
Feels more natural.

Love the fast accurate smooth transaction process and that it was delivered in a matter of days. Compared to others that take at least a week for delivery. It is a more natural and comfortable feel compared to the factory B5 stock I had. Fits better and tighter in the pocket while wearing a plate carrier. The cheek rest is a little wider and the storage compartments is an added bonus. That’s makes this one far better then original I had it was money well spent.

Great review! I agree that the ACS stock feels more natural and fits better than the factory stock. The cheek rest is also much wider, which is great for comfort. The storage compartments are a great addition.

D
Dylan Allen

Magpul ACS Carbine Storage Stock - Mil-Spec AR-15 - MAG370

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

G
Greig Fahnlander
Excellent and quick service!

Items all arrived quickly and couldn’t be happier. Thanks AT3!

We appreciate your feedback, Greig. We're happy to hear that you're satisfied with your purchase! -- LM

Customers who viewed this item also viewed these products

Magpul MOE Fixed Stock - Mil Spec AR-15 - MAG480

Magpul MOE Fixed Carbine Stock - Mil Spec AR-15 -...

$37.95
Fixed Magpul Carbine Stock for AR-15 The Magpul MOE Fixed Stock – Mil-Spec offers

Amend2 Modular Carbine Stock - Mil-Spec AR-15

(no reviews yet)
$56.99
Amend2 Modular Carbine Stock – Customizable Mission-Configured Design The Amend2 Modular Stock (AMS) offers
MAGPUL MOE RL MIL-SPEC AR-15 Carbine Stock - Multiple Colors

MAGPUL MOE RL MIL-SPEC AR-15 Carbine Stock - Multiple Colors

(no reviews yet)
$42.70
Magpul MOE RL AR-15 Carbine Stock: Classic A-Frame, Modern Functionality The Magpul MOE RL

Magpul MOE SL-M Carbine Stock – Mil-Spec AR-15/M4 – MAG1242

$42.70
Sleek & Smaller Buttstock Optimized For Compact PDW Style Weapons The Magpul MOE SL-M
FDE

B5 Bravo AR-15 Stock - Mil-Spec

The minimalist’s pick for peak performance Streamlined for users who want optimal performance without
Magpul DT Carbine Stock – MIL-SPEC AR-15 – MAG1377

Magpul DT Carbine Stock – MIL-SPEC AR-15 – MAG1377

$61.70
DT Carbine Stock: Rugged Precision for AR-Style Platforms Revolutionize your AR15/M16/M4 carbine setup with
Magpul STR Carbine Stock - Mil Spec AR-15 - MAG470

Magpul STR Carbine Stock - Mil Spec AR-15 - MAG470

$80.70
The Most Comprehensive Stock on the Market – Great Value for Your Money Upgrade
THRIL CCS AR-15 Combat Competition Stock - Mil-Spec

THRIL CCS AR-15 Combat Competition Stock - Mil-Spec

$57.95
A Compact, Lightweight, & Feature-Rich Replacement Buttstock For Your AR The THRIL CCS AR-15
Magpul ACS-L Carbine Storage Stock - Mil-Spec AR-15 - MAG378

Magpul ACS-L Carbine Storage Stock - Mil-Spec AR-15 - MAG378

$80.70
Slimmer and Lighter – Better Performance! The Magpul ACS-L Carbine Storage Stock – Mil-Spec
AR 15 Buttstock Magpul CTR Carbine Stock Mil-Spec

Magpul CTR Carbine Stock Mil-Spec AR-15 - MAG310

$66.49
An Upgrade For MOE Carbine Stocks For Enhanced Weapon Stability The Magpul CTR Carbine
AR 15 Buttstock Magpul MOE Carbine Stock

Magpul MOE Carbine Stock - MIL-SPEC AR-15 - MAG400

$42.70
Simplicity Meets Quality – Get The Best Without Breaking The Bank The Magpul MOE
MAGPUL DT-PR MIL-SPEC AR-15 Carbine Stock - Multiple Colors

MAGPUL DT-PR MIL-SPEC AR-15 Carbine Stock - Multiple Colors

(no reviews yet)
$61.70
Magpul DT-PR AR-15 Carbine Stock – Precision Meets Tactical Versatility The Magpul DT-PR Carbine

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...