Description
The Stag Arms Stag 10 M-LOK 308 Winchester 18″ Barrel, Magpul ACS Black Stock Black Hardcoat Anodized/Black Phosphate, 10rd is a modern sporting rifle chambered in .308 Winchester. It’s a direct-impingement AR-10 platform rifle built for precision and reliability, featuring an 18-inch barrel, a free-float M-LOK handguard, and a Magpul ACS stock. This configuration offers a balanced blend of accuracy, modularity, and handling for demanding use. It ships to Missouri and compliant US states.
Key Features
- 18-inch 4150 Chrome Moly Vanadium Steel Barrel: Provides optimal velocity and accuracy for the .308 Winchester cartridge.
- Free-Float M-LOK Handguard: Lightweight, rigid, and ready for mounting lights, lasers, and grips without proprietary tools.
- Magpul ACS (Adjustable Cheek and Storage) Stock: Offers a solid cheek weld, length-of-pull adjustment, and internal storage compartments.
- Two-Stage Match-Grade Trigger: Delivers a crisp, predictable break for improved shot control.
- Black Hardcoat Anodized/Black Phosphate Finish: Durable corrosion resistance for all-weather reliability.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | .308 Winchester / 7.62x51mm NATO |
| Barrel Length | 18 inches |
| Overall Length (Extended) | Approx. 38.5 – 42 inches |
| Weight (Unloaded) | Approx. 9.5 lbs |
| Magazine Capacity | 10 Rounds (Includes one Magpul PMAG) |
| Trigger | Two-Stage Match Grade |
This rifle is built on Stag’s proprietary Stag 10 platform, which is designed for robust performance. The upper and lower receivers are machined from 7075-T6 aluminum forgings and finished with a tough black hardcoat anodize. The bolt carrier group features a phosphate finish for added durability. The rifle comes with a Magpul MOE+ grip and is compatible with a wide range of standard AR-10/M5 pattern components and accessories, including triggers, charging handles, and buffer systems from brands like Aero Precision and CMMG. At $1150.74, it represents a significant value in the large-frame AR market.
Who It’s For
This rifle is for the shooter who needs a versatile, hard-hitting platform. When it comes to medium-range target shooting or hunting in Missouri’s varied terrain, the .308 cartridge has the authority for deer and larger game. It’s also a practical choice for a designated marksman role in tactical training or as a primary rifle for home defense in rural settings where shot distances can be longer. The 18-inch barrel strikes a critical balance—it’s maneuverable enough for use in a vehicle or tight spaces yet long enough to maximize the .308’s ballistic potential. The M-LOK system means you can configure it exactly for your mission, whether that’s adding a bipod for the bench or a white light for low-light conditions.
Pros & Cons
Pros: The two-stage trigger is a standout feature right out of the box, providing immediate performance gains without an upgrade. The Magpul ACS stock is a significant upgrade over basic models, offering real utility with its storage and adjustability. The full free-float handguard maximizes accuracy potential by eliminating barrel pressure points. Build quality is solid, with tight tolerances and a finish that stands up to hard use.
Cons: At around 9.5 pounds unloaded, it’s not a lightweight rifle—adding an optic and a loaded magazine brings it well over 10 pounds. The 10-round magazine is compliant but may be limiting for some users; fortunately, standard Magpul PMAGs are readily available. As with any AR-10 pattern rifle, parts commonality isn’t as universal as the AR-15, but the Stag 10 uses the popular DPMS pattern.
Frequently Asked Questions
Q: Is this rifle ready to shoot upon receipt?
A: Yes, it is drop-in ready. It ships with one 10-round Magpul PMAG. You will need to supply your own optic or iron sights, ammunition, and complete a standard FFL transfer for firearm purchases through your local dealer.
Q: What is the effective range with the 18-inch barrel?
A: With quality .308 Winchester ammunition, the 18-inch barrel is capable of consistent, accurate fire out to 600-800 yards in the hands of a skilled shooter. For hunting, it is more than sufficient for ethical shots on game at typical woodland and field distances.
Q: Can I use my existing AR-15 accessories on this rifle?
A: Many accessories are cross-compatible. The M-LOK handguard will accept any M-LOK mounted accessory (lights, grips, etc.). The pistol grip and stock interface are mil-spec, so those components swap directly. However, magazines, bolts, barrels, and upper/lower receivers are specific to the AR-10/.308 platform and are not interchangeable with AR-15 parts.
Here’s the thing—this Stag 10 configuration gives you a serious, capable rifle without the need for immediate modifications. It’s a tool built for a purpose, blending proven design with modern features at a direct price point. Available at firearms-missouri.com for Missouri residents and nationwide.



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