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

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Sleek & Smaller Buttstock Optimized For Compact PDW Style Weapons

The Magpul MOE SL-M Carbine Stock MAG1242 is a drop-in replacement buttstock for AR15/M4 carbines using mil-spec sized receiver extension tubes. Similar to the Magpul SL-K, the SL-M features a shorter and slimmer profile that is optimized for PDW-length receiver extensions.

The Magpul MOE SL-M Carbine Stock offers a rugged and solid construction specifically developed for ultra-compact, PDW-style military platform requirements and also for users who want a sleek and smaller stock for a lightweight rifle build.

Ideal For Lightweight Builds

The Magpul MOE SL-M Carbine Stock MAG1242 is made of reinforced polymer making it ideal for lightweight builds. Its short and slimmer profile, as well as the smaller non-slip rubber butt-pad, helps avoids snagging especially when shouldering the rifle for enhanced stability.

It also offers a unique, ambidextrous release latch that is shielded to prevent accidental deployment and minimizes rattle on the receiver extension without requiring additional locks, levers, or springs. It has a 1.25″ footman’s loop that accepts an optional M-LOK QD Sling Mount for push-button style QD sling swivels.


  • Reinforced polymer construction
  • Reduced size is ideal for PDW platforms
  • Internal release latch feature mitigates rattle and wobble
  • Ambidextrous shielded adjustment lever
  • Angled toe for easy shouldering
  • Non-slip rubber butt-pad
  • 1.25″ ambidextrous sling loop
  • Accepts M-LOK QD Sling Mount for QD sling swivel capability


  • Platform: AR10, AR15, M4, M16, M110, SR25
  • Compatibility: Mil-Spec sized carbine receiver extension tubes and other aftermarket PDW length tubes (not included)
  • LOP, M4 Collapsed: ~ 9.4 in.
  • LOP, M4 Extended: ~ 12.7 in.
  • LOP Adjustment Range: 3.3 in.
  • Length, max: 5.8 in.
  • Height, max: 4.2 in.
  • Weight: 7.1 oz.

NOTE: Specifications are based on standard-length (flat-back) M4 Carbine receiver extension and may vary depending on the tube manufacturer

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Have Questions About this Product?

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 4 reviews
Dravvis Sanders
Solid product

Has some play but very minimal, no QD mount which sucks but made the sling hole loop work

Texas Carl
Very good

So I bought 2 of these as I have recently got 2 SBRs our of ATF jail.. wanted to shorten them slightly to fit into some short gun bags I have... love them.. excellent quality and best price I could find..

Bill W
Great fit and quality

Fit, finish and performance of the FDE colored stock is excellent. Great accessory from Magpul. Will use this style in builds again in the future. AT 3 fast shipping and great pricing.

Thank you for your review of the Magpul MOE SL-M Carbine Stock - Mil-Spec AR-15/M4 - MAG1242. We're happy to hear that you're pleased with the fit, finish, and performance of this stock. We're glad to have you as a customer and look forward to serving you in the future.

Alejandro Companioni
Title: "Magpul MOE SL-M Carbine Stock: A Game-Changing Upgrade for AR-15/M4 Rifles!"

Sure! Here's a shorter and concise review:

"The Magpul MOE SL-M Carbine Stock is a game-changer for my rifle. The solid build, comfortable design, and adjustable features make it a must-have. The slim profile and rubberized buttpad enhance control and reduce recoil, while the adjustable length of pull and sling attachment points add versatility.

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