ArmaLite AR103GN13 AR-10 .308 Win 25+1 – MBA-1 Stock
About this product
The ArmaLite AR103GN13 AR-10 is a competition-built .308 Winchester rifle using MIL-SPEC 7075-T6 receivers, a Timney single-stage trigger, and an adjustable Luth-AR MBA-1 stock. This is a direct-impingement gas system platform configured from the factory for practical precision rifle and 3-gun disciplines. The pinned and welded ArmaLite tunable muzzle brake is a particularly intelligent inclusion for managing recoil on long stages.
What is the ArmaLite AR103GN13 used for?
This rifle is built for competitive shooting disciplines that require speed, positional adaptability, and precision under pressure, specifically PRS-style matches and 3-gun. The Luth-AR MBA-1 stock provides immediate length-of-pull and cheek weld adjustability for transitioning between barricades and prone, while the 12-inch M-LOK free-float handguard offers multiple mounting options for bipods, bags, and grip panels. Its 25+1 magazine capacity is tailored for stage designs that push round counts beyond standard 20-round box limits, letting you complete most stages without a reload.
How does the ArmaLite AR103GN13 compare to the Stevens 334?
The AR103GN13 excels in rapid, repeatable shot placement at varied ranges, while the Stevens 334 Rifle in .308 Win offers superior single-shot mechanical accuracy from a static bench for half the price. The ArmaLite's semi-automatic action and adjustable stock enable faster follow-up shots and positional adaptability, critical in competition. In contrast, the bolt-action Stevens 334, with a simpler 20-inch barrel assembly, is fundamentally more accurate for a first-round cold-bore shot from a rest, making it a better choice for a dedicated precision hunter or budget-minded target shooter who doesn't need speed.
What does it weigh and what are the dimensions?
Unloaded with an empty magazine, the rifle weighs 10.7 pounds, and its overall length adjusts from 38.5 to 42.25 inches depending on the MBA-1 stock's LOP setting. The 20-inch match-grade stainless steel barrel contributes significantly to that heft and the 9.2-pound feel on the shoulder, providing the mass necessary for stable tracking on moving targets and mitigating felt recoil. The 12-inch handguard offers a forward mounting surface that places a bipod approximately 18 inches from the receiver face, creating a very stable platform for prone shots.
Who is this NOT for?
This is not a rifle for a first-time firearm owner or someone seeking a lightweight hunting rig. The 10.7-pound weight makes it cumbersome for long stalks in the mountains, and its 20-inch barrel with a pinned muzzle device makes it a non-starter for those considering a future 16-inch SBR or suppressor build without major gunsmithing. Beginners would be better served by a more basic, less expensive platform like a Stevens 334 in .243 Win to learn fundamentals without being overwhelmed by adjustments and competition-specific tuning.
What's in the box?
You receive the complete rifle, one 25-round ArmaLite-pattern magazine, and the standard factory literature including the owner's manual and safety warnings. Notably absent is any optic, mounting system, or sling—the 'optics ready' designation means you are responsible for sourcing and installing your preferred scope or red dot and a compatible mount. The package also lacks the specific Allen wrenches needed for the MBA-1 stock adjustments, though a standard multi-tool set will suffice.
Is the ArmaLite AR103GN13 worth it at $2,307.99?
Yes, at $2,307.99, it represents strong value for a dedicated competition shooter needing a reliable, out-of-the-box-ready .308 AR platform. The combined cost of sourcing a quality lower, upper, Timney trigger, Radian Raptor charging handle, and MBA-1 stock separately would easily exceed this price point before assembly labor. The investment is justified by the curated component selection that works cohesively, saving you from the trial-and-error (and potential reliability issues) of a piecemeal build when your goal is stage wins, not gunsmithing projects.
Specs at a glance
Video review
Pros & cons
What works
- Timney single-stage trigger with a consistent 3.5-pound break — eliminates mush and overtravel common in mil-spec triggers.
- Fully adjustable Luth-AR MBA-1 stock — provides 1.5 inches of length-of-pull travel and 0.75 inches of cheek riser height adjustment for perfect weld.
- Ambidextrous Radian Raptor charging handle and safety — enables rapid, positive manipulation from either shoulder in under 1 second.
- 25+1 magazine capacity — exceeds the standard 20-round box, allowing completion of most competition stages without a reload.
Trade-offs
- Pinned and welded muzzle brake — permanently affixed, making suppressor mounting or brake replacement a costly gunsmithing operation ($150+).
- Heavy 10.7-pound unloaded weight — cumbersome for dynamic stages or hunting, adding fatigue over a 6-hour match.
- ArmaLite-specific magazine pattern — limits magazine options compared to the ubiquitous DPMS/SR-25 pattern, adding $5-10 per magazine cost.
Expert review
Key attributes
| upc | 651984015957 |
| manufacturer | Armalite |
| manufacturer part number | AR103GN13 |
| action | Semi-Auto |
| barrel length | 13.50" |
| caliber/gauge | .308 / 7.62 NATO |
| capacity | 25 + 1 |
| safety | Ambidextrous |
| shipping weight | 11.1 |
| sights | Picatinny Rail |
Frequently asked questions
- Is it compatible with SR-25 pattern magazines?
- No, the AR103GN13 uses the original ArmaLite AR-10 pattern magazines, which are not cross-compatible with the more common DPMS/SR-25 pattern. You must source ArmaLite-specific magazines, which are readily available from vendors like Magpul (PMAG® 25 GEN M3) or ArmaLite directly. Using an SR-25 pattern magazine will cause feeding failures and potentially damage the rifle's lower receiver.
- Does the muzzle brake accept a suppressor?
- No, the ArmaLite tunable muzzle brake is pinned and welded to the barrel, sealing the 20-inch barrel as a permanent fixture. This was done to comply with federal minimum barrel length requirements without a tax stamp. To mount a suppressor, you would require a qualified gunsmith to remove the brake and likely re-thread the barrel, a process costing $150-300 plus the NFA tax stamp and wait time for the suppressor itself.
- How long does shipping take to an FFL?
- Order processing takes 1-2 business days, and ground shipping typically adds 3-7 business days transit time depending on your location relative to our warehouse. The rifle must ship to a valid, licensed FFL dealer of your choice, who will then conduct the required background check upon your arrival. Always contact your chosen FFL before placing your order to confirm they accept transfers from online retailers.
- Can I return it if I don't like the trigger?
- No, firearms sales are final upon transfer at your FFL due to federal regulations and for safety and liability reasons. If the Timney single-stage 3.5-pound pull isn't to your preference, you can replace it with any AR-10 compatible drop-in trigger unit, which is a straightforward process requiring basic tools. We recommend handling and dry-firing similar rifles at a local range or store before purchase to gauge trigger preference.