ArmaLite AR10TAC18 AR-10 .308 Win 18-inch 25+1
Pros & cons
What works
- Forged 7075-T6 aluminum receivers – meets MIL-A-8625F specification for hardness and durability.
- Adjustable gas block – allows for tuning with suppressors or varying ammunition across a 6-position click-adjustment range.
- 18-inch 416R stainless steel barrel – provides 1:10 twist rate optimized for 168-175 grain match .308 loads.
- Includes Magpul MBUS sights and STR stock – saves approximately $180 in immediate aftermarket accessory costs.
Trade-offs
- Uses KeyMod handguard – accessory ecosystem is shrinking compared to the dominant M-LOK standard, limiting off-the-shelf options.
- Weighs 8.8 lbs empty – with optic, suppressor, and loaded magazine, it easily exceeds 11 lbs, making it heavy for sustained offhand shooting.
- No included optic mount or optic – requires additional purchase of a quality mount (≈$75-$200) and optic (≈$300+) for precision work.
Video review
Expert review
Specs at a glance
About this product
What is the ArmaLite AR10TAC18 AR-10 .308 Win 18-inch 25+1? It is a semi-automatic rifle built on the original AR-10 platform, designed to bridge the gap between military-spec duty use and commercial long-range precision shooting. Chambered in .308 Winchester/7.62 NATO, it features an 18-inch stainless steel barrel with an adjustable gas block and ships with Magpul furniture, making it a rifle you can configure directly off the bench rather than one requiring immediate aftermarket investment. This specific configuration prioritizes a balance between ballistic performance from the 18-inch barrel and maneuverability in the field, a compromise I see operators and serious hunters make regularly.
What is the AR10TAC18 used for?
The AR10TAC18 is used for medium to long-range engagements, practical/tactical rifle matches, and hunting for game like elk or deer where shots may extend beyond 300 yards. Its 18-inch barrel maximizes velocity from the .308 cartridge compared to a 16-inch model, gaining roughly 75-100 feet per second, which matters for terminal ballistics and wind bucking. The rifle-length gas system and adjustable block allow you to tune recoil impulse and reliability when adding a suppressor, a feature hunters and tactical shooters will appreciate.
How does the AR10TAC18 compare to the Stevens 334 Rifle in .308 Win?
The AR10TAC18 is better for rapid follow-up shots and modular accessory mounting, while the Stevens 334 Rifle bolt-action is better for pure mechanical accuracy from a fixed platform at a lower cost. The AR10TAC18 offers a semi-automatic action capable of 25+1 rounds versus the Stevens 334's 4-round internal magazine, and its 15-inch KeyMod handguard provides vast real estate for lights, lasers, and bipods that the Stevens' synthetic stock cannot. For a shooter prioritizing volume of fire, customization, and a familiar manual of arms over sub-MOA benchrest accuracy, the ArmaLite platform is the clear choice.
What does it weigh and what are the dimensions?
The rifle weighs 8.8 pounds unloaded and measures between 37.5 and 41.5 inches in overall length depending on the six-position Magpul STR stock. That 8.8-pound weight is with an empty magazine; add a loaded 25-round PMAG and you're pushing 10.5 pounds, which is substantial for extended carries. The 18-inch barrel with a 1:10 twist rate gives you a sight radius of 20.5 inches with the included Magpul MBUS sights deployed, adequate for fast acquisition out to 200 meters.
Who is this NOT for?
This rifle is not for first-time shooters, budget-conscious buyers looking for a simple hunting tool, or those seeking the absolute lightest .308 platform. The recoil impulse, weight, and operational complexity of an adjustable-gas AR-10 are significant steps up from an entry-level bolt-action like the Stevens 334. Furthermore, at nearly $2,300, the initial investment is just the start; quality .308 ammunition costs around $1.25 per round for match-grade, making practice expensive.
What's in the box?
In the box, you receive the complete rifle with Magpul MBUS Gen 2 flip-up sights installed, one 25-round Magpul PMAG LR/SR GEN M3 magazine, an operator's manual, and a cable lock. Notably, the rifle does not include a optic, sling, or cleaning kit, which are essential for field use. The Magpul STR stock comes pre-installed in the mid-position, and the adjustable gas block is preset from the factory for unsuppressed use with standard-pressure 7.62 NATO ammunition.
Is the AR10TAC18 worth it at $2,277?
At $2,277, the AR10TAC18 is worth it for shooters who need a battle-ready .308 platform out of the box and value the ArmaLite name, forged receivers, and adjustable gas system over building a similar rifle from parts. You are paying for a complete, tested system with proven components like the Magpul stock and handguard; a comparable custom build with the same features would likely run $1,800-$2,100 in parts alone before gunsmithing labor. If your use case is strictly occasional hunting, a Stevens 334 in .243 Win at half the price is the more rational choice.
Key attributes
| upc | 651984015872 |
| manufacturer | Armalite |
| manufacturer part number | AR10TAC18 |
| action | Semi-Auto |
| barrel length | 18" |
| caliber/gauge | .308 / 7.62 NATO |
| capacity | 25 + 1 |
| safety | Ambidextrous |
| shipping weight | 11.35 |
| sights | Magpul MBUS Front & Rear |
Frequently asked questions
- Is it compatible with SR-25 pattern magazines?
- Yes, the AR10TAC18 uses the SR-25/LR-308 magazine pattern, which includes Magpul PMAG LR/SR GEN M3 magazines like the included 25-rounder. This is the most common pattern for modern AR-10 platforms, ensuring wide availability from brands like Magpul, Lancer, and KAC. The magazine well is milled to NATO-spec dimensions for reliable feeding with both .308 Winchester and 7.62 NATO rounds.
- Does the KeyMod handguard accept M-LOK accessories?
- No, the 15-inch handguard uses the KeyMod attachment system, which is not directly compatible with M-LOK accessories without an adapter. You will need to purchase KeyMod-specific mounts for lights, grips, and rails. Adapter panels from companies like Magpul exist but add approximately 0.5 ounces of weight and 0.1 inches of bulk per attachment point.
- How long does shipping take to an FFL?
- Shipping to your selected Federal Firearms License (FFL) dealer typically takes 3-5 business days once the order clears our compliance check and payment is processed. All firearms ship via UPS or FedEx with adult signature required and are tracked with a discrete label. You must contact your FFL in advance to provide their license information to our compliance team before shipment.
- Can I replace the barrel with a different length?
- Yes, the barrel is removable using an AR-10 armorer's wrench and vise block, but installing a barrel shorter than 16 inches creates a Short-Barreled Rifle (SBR) regulated under the National Firearms Act (NFA). Such a conversion requires prior ATF approval via a Form 1, a $200 tax stamp, and a wait time currently averaging 30-45 days. The rifle-length gas system on this 18-inch model may require retuning with a different gas tube if switching to a significantly shorter barrel.