Magpul ACS Mil-Spec AR-15 Carbine Stock OD Green
Magpul Industries
$90.20
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Magpul Industries
Magpul ACS Mil-Spec AR-15 Carbine Stock OD Green
The Magpul ACS Mil-Spec AR-15 Carbine Stock in OD Green is a rugged, feature-packed buttstock that combines field-ready storage solutions with the enhanced stability and anti-snag design Magpul is known for — a true drop-in upgrade for any mil-spec AR-15 or M4 platform.
- Drop-in fit for mil-spec receiver extension tubes — no tools required
- Dual water-resistant battery storage tubes accessible from the rear
- Integral butt compartment offers additional secure field storage space
- Anti-snag friction lock minimizes stock wobble for improved accuracy
- 0.30" rubber butt-pad ensures positive shoulder purchase with body armor
- OD Green finish blends seamlessly with tactical and mil-spec builds
Who This Is For
The Magpul ACS is ideal for AR-15 owners who demand more than a basic collapsible stock — whether you're a serious competitor, a home defender, or a working professional who needs quick access to batteries for lights, lasers, or electronic optics. Its snag-free latch and solid lockup make it equally at home on the range or in the field, and the OD Green colorway suits both woodland and all-purpose tactical setups.
Specifications
| Brand | Magpul Industries |
|---|---|
| Model | ACS (Adaptable Carbine/Storage) |
| Color | OD Green |
| Fit | Mil-Spec Receiver Extension Tube |
| Compatible Platforms | AR-15 / M4 Carbine |
| Butt-Pad Thickness | 0.30 inches (rubber) |
| Storage | Dual battery tubes + butt compartment |
| Storage Water Resistance | Water-resistant battery tubes |
| Latch Type | Anti-snag with friction lock |
| Positions | 6 (standard carbine extension) |
| Material | Reinforced polymer |
| Country of Origin | USA |
Frequently Asked Questions
Will the Magpul ACS fit my AR-15's existing buffer tube?
The Magpul ACS Mil-Spec model is designed to fit standard mil-spec diameter receiver extension (buffer) tubes — the most common size found on AR-15 and M4-pattern carbines. It is not compatible with commercial-spec buffer tubes, which have a slightly larger and tapered diameter. If you're unsure which tube you have, measure the outer diameter: mil-spec tubes measure approximately 1.148" while commercial tubes measure approximately 1.168" at the widest point.
What can I store in the ACS battery tubes and butt compartment?
The dual rear-accessible storage tubes are sized to hold CR123A batteries — commonly used in weapon lights and laser sighting systems — and are sealed to be water-resistant, keeping your spares protected in adverse conditions. The integral butt compartment provides additional space for small essentials like a folded cleaning patch, a spare bolt firing pin, or other compact field items. These storage features set the ACS apart from standard collapsible stocks like the Magpul CTR.
How does the ACS compare to the Magpul CTR stock?
Both the ACS and CTR share Magpul's anti-snag latch design and supplemental friction lock system for a rock-solid lockup on mil-spec tubes. The primary difference is storage: the ACS adds dual water-resistant battery tubes and a butt compartment that the CTR lacks. The ACS is also slightly heavier and longer as a result of these features. If streamlined simplicity is your goal, the CTR is a great choice; if on-board storage matters to your loadout, the ACS delivers meaningful utility without sacrificing stability.
