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Magpul MAG1377BLK DT Carbine Stock Black Synthetic for AR-15, M16, M4 with Mil-Spec Tube (Tube Not Included)
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$66.99
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SKU: MAG1377BLK-840815147541
Overview
Built as a drop-in replacement for AR-15, M16, and M4 carbines with Mil-Spec profile receiver extensions, this stock is aimed at shooters who want a more secure, adjustable setup without changing the platform’s basic layout. Its dual tensioning design and auto-engaging friction lock are intended to reduce movement at the receiver extension while keeping length-of-pull changes smooth and straightforward. The A-frame profile, ambidextrous adjustment lever, rotation-limiting QD sling mount, and 1.25 footman’s loop add practical handling options for field or range use. Tube is not included, so it suits builds where a compatible receiver extension is already in place.
Why Hunters Choose the Magpul
Drop-in Replacement
Mil-Spec profile receiver extensions
Dual Tensioning
Technology adds extra lockup and
Auto-engaging Friction
Lock supports quick, smooth length-of-pull
Ambidextrous Adjustment
Lever suits left- or right-handed
Includes Rotation-limiting
QD sling mount and 1.25
Key Features
- Drop-in replacement buttstock for AR15/M16/M4 carbines with Mil-Spec profile receiver extensions.
- Dual tensioning technology for added strength, security, and a more stable platform.
- A-frame style carbine stock with auto-engaging friction lock during adjustment.
- Extra tight lockup helps minimize movement between the lock pin and receiver extension.
- Ambidextrous adjustment lever for easy length-of-pull changes.
- Includes a rotation-limiting QD sling mount and 1.25 footmans loop.
- Tube not included; adjustable length of pull on compatible AR platforms.
Best Used For
- AR-15, M16, or M4 owners using Mil-Spec receiver extensions needing a drop-in stock replacement
- Hunters wanting quick length-of-pull adjustments during changing field positions or layered clothing
- Users prioritizing a more secure stock lockup on a rugged, hard-use carbine setup
- Left- or right-handed shooters who want an ambidextrous adjustment lever
- Shooters adding a QD sling mount and footman's loop to a compatible AR platform
Specifications
| Adjustment Lever | Ambidextrous |
|---|---|
| Butt Pad | Non-slip butt-pad |
| Firearm Type | AR Platform |
| Footmans Loop | 1.25 footmans loop |
| Length Of Pull | Adjustable |
| Platform Compatibility | AR15/M16/M4 carbines or comparable platforms |
| Product Type | Carbine Stock |
| Receiver Extension Compatibility | Mil-Spec profile receiver extensions |
| Sling Mount | Rotation-limiting QD sling mount |
| Stock Style | A-frame style carbine stock |
| Tube Included | No |
Pros
- Drop-in replacement for AR15/M16/M4 carbines with Mil-Spec profile receiver extensions
- Dual tensioning technology adds extra lockup and helps minimize stock movement
- Auto-engaging friction lock supports quick, smooth length-of-pull adjustments
- Ambidextrous adjustment lever suits left- or right-handed use
- Includes rotation-limiting QD sling mount and 1.25 footman's loop
- Non-slip butt-pad with SL footprint and CTR-inspired curvature
Considerations & Trade-offs
- Requires a Mil-Spec profile receiver extension; it is not a universal fit for all AR-style setups.
- Tube is not included, so the stock is only a drop-in option if the buffer tube is already in place.
- The adjustable length of pull adds flexibility, but it also means the stock is not a fixed-length setup.
- Features such as the QD sling mount and footman's loop are useful, but they may be unnecessary if your rifle already has preferred sling attachment points.
Suggested Comparisons
- AR-15/M16/M4 carbine stocks
- Mil-Spec receiver extensions
- QD sling mounts
- Adjustable buttstocks
Suggested Accessories
- Sling
- QD sling swivel
- Buffer tube
- Carbine stock
Frequently Asked Questions
Will this stock fit my AR-15, M16, or M4 setup?
It is described as a drop-in replacement buttstock for AR15/M16/M4 carbines, or comparable platforms, that use Mil-Spec profile receiver extensions.
Does the buffer tube come with the stock?
No. The specifications state that the tube is not included.
What makes the DT Carbine Stock different from a basic replacement stock?
The product description says it combines features from the SL and CTR lines and uses dual tensioning technology, along with an auto-engaging friction lock, for a tighter lockup and adjustable length of pull.
Can the stock be adjusted from either side?
Yes. The listed features include an ambidextrous adjustment lever.
Does it have sling attachment options?
Yes. The description lists a rotation-limiting QD sling mount and a 1.25 footman’s loop.