What rifles are compatible with the Magpul ACS Stock?

The Magpul ACS Stock fits AR-15 and M4-style rifles with mil-spec carbine buffer tubes. It does not fit commercial-spec tubes.

Does the ACS Stock have storage compartments?

Yes, the Magpul ACS Stock includes two water-resistant battery storage tubes and a central storage compartment behind the buttpad.

How does the ACS compare to the STR or ACS-L?

The ACS offers more storage and a wider cheek weld than the ACS-L. Compared to the STR, it’s slightly heavier but better for users needing battery or tool storage.

Is installation of the Magpul ACS Stock difficult?

No, the ACS Stock is a drop-in replacement for mil-spec buffer tubes and can be installed in minutes with basic tools.

Magpul ACS Stock – Mil-Spec AR-15 Adjustable Carbine Stock

Magpul ACS vs ACS-L

Magpul ACS vs STR

What is the Difference Between Magpul ACS and ACS-L?

Magpul ACS Stock – Rugged, Reliable, and Built for Duty

The Magpul ACS (Adaptable Carbine/Storage) Stock is a premium upgrade for your AR-15 mil-spec carbine — giving you enhanced comfort, storage, and a consistent cheek weld without compromising durability. Whether you're building a field-ready rifle or fine-tuning a competition setup, the ACS delivers professional-grade performance trusted by serious shooters.

🔧 Key Features of the Magpul ACS Stock

Sealed Battery Storage
Two water-resistant storage tubes located at the rear hold batteries, tools, or small essentials like earplugs.
Enhanced Cheek Weld
A wider, sloped surface helps you maintain consistent eye alignment when running optics or irons.
Friction Lock System
Reduces rattle and wobble on the buffer tube — ensuring a rock-solid lock-up with minimal movement.
Rubber Buttpad
Helps absorb recoil and prevent slipping on gear or body armor.
Quick Install
Drop-in fit for mil-spec buffer tubes — no gunsmithing required.

🆚 Compare Magpul Stocks: ACS vs STR vs ACS-L

Model	Rail Type	Length	Weight	Best For
AFG (Gen 1)	Picatinny	5.5"	2.9 oz	Full-length rails, max grip area
AFG-2	Picatinny	4.7"	2.5 oz	Compact setups, shorter rails
AFG M-LOK	M-LOK Slots	4.7"	1.9 oz	Modern, slim-profile builds

📌 The ACS provides the best mix of stability, storage, and comfort — ideal for demanding shooters who carry more on the rifle itself.

🧰 Installation & Compatibility

Fits: AR-15, M4, and similar rifles with mil-spec carbine buffer tubes
Does NOT Fit: Commercial-spec tubes
Install Time: ~2 minutes using standard tools
Made in the USA: Backed by Magpul’s reputation for reliability

👤 Who Should Choose the ACS?

Law enforcement & tactical shooters – Add mission-critical battery storage and optic-ready stability
3-Gun & competition shooters – Consistent eye relief under pressure
Prepared rifle owners – Carry tools or spares directly in your stock
AR-15 builders – Premium look and performance from a brand you trust

🚚 Why Buy the ACS from Mounts Plus?

✅ Authorized Magpul Dealer
✅ Fast shipping from the USA
✅ Real inventory – no dropshipping
✅ Trusted since 1994

From range day to duty day, the Magpul ACS Stock gives you the fit, function, and flexibility you need. Order now and experience the Magpul difference on your next build.