The Magpul MOE Carbine Stock is a mil-spec collapsible carbine stock for AR-15 and M4 rifles, fitting any Mil-Spec-diameter receiver extension.
The Magpul MOE Carbine Stock (MAG400) replaced millions of rattling, sharp-edged mil-issue stocks for good reason. Its A-frame profile adds structural rigidity while shielding the adjustment lever from accidental release, and the sloped cheek weld area gives a comfortable, consistent reference for your face — shot after shot. Multiple sling attachment options, including slots on both sides, rig cleanly for any carry style.
Built from Magpul's reinforced polymer, the MOE handles impacts, solvents and temperature swings without complaint. For a first build, a working truck gun or a fleet upgrade, few upgrades deliver this much genuine improvement for the money.
Key Features
- Rigid A-frame profile: stronger structure, protected release lever
- Comfortable, repeatable cheek weld: consistent sight picture
- Multiple sling slots: ambidextrous rigging options
- Reinforced polymer construction: proven on millions of rifles
- Three finishes: Black, Flat Dark Earth, Olive Drab Green
Compatibility & Fitment
This is the Mil-Spec version, so it fits AR-15/M4 rifles running a Mil-Spec-diameter carbine receiver extension (buffer tube). Commercial-diameter tubes are slightly larger and the stock will not seat properly on them, so check your tube specification before you buy. Depress the lever, slide it on, done — the classic five-minute upgrade that transforms how a factory carbine feels.
Technical Specifications
Platform | AR-15 / M4 |
Fits | Mil-Spec carbine receiver extension |
Type | A-frame carbine stock |
Material | Reinforced polymer |
Finish | Black, Flat Dark Earth, Olive Drab Green |
US Shipping & Support
Shipped from D&R Sports Center in the USA with fast, tracked delivery. Questions on fit, mounting or which model suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
Which buffer tubes does the MOE carbine stock fit?
This is the Mil-Spec version, so it fits AR-15/M4 rifles running a Mil-Spec-diameter carbine receiver extension. Commercial-diameter tubes are slightly larger and the stock will not seat properly on them, so check your tube specification before you buy. If you are unsure which you have, measure the tube or get in touch with your rifle's make and model.
What does the MOE stock give me over a plain M4 stock?
The MOE (MAG400) is built around a rigid A-frame profile, which keeps the stock body stiff and reduces the wobble you often feel on basic collapsible stocks. It is a straightforward, no-frills design with no storage compartments or built-in QD sockets, which keeps it light and snag-free. For most shooters it is a simple upgrade in feel rather than a change in how the rifle is used.
How does it compare with the other MOE stocks in the range?
The plain MOE is the baseline: rigid, simple and light. Other MOE variants add features such as extra sling attachment options or different cheek and buttpad treatments, so if you want QD sockets or a rubber pad it is worth comparing across the family.
What colors are offered and what else do I need to fit it?
It is available in Black, Flat Dark Earth and Olive Drab Green so it can be matched to your grip and handguard. Fitting is a matter of removing the old stock and sliding this one on, so no extra hardware is normally required beyond your existing buffer tube and castle nut setup.
