When the starting buzzer sounds at a 3-Gun match, the difference between a solid run and a podium finish often comes down to how well your rifle balances speed with precision. The ARMALITE AR-10A 3 GUN RIFLE AR103GN13, chambered in .308 Win, is designed to deliver that balance for competitors who need fast follow-up shots without sacrificing the terminal performance of a full-power cartridge. Whether you’re engaging steel at 500 yards or cycling through close-range pistol-caliber stages, this rifle brings a 13.5-inch barrel and a 25-round magazine capacity to the line—configurations that matter to U.S. shooters who demand reliability in a competition setting.
What This Product Is and Who It’s For
The ARMALITE AR-10A 3 GUN RIFLE AR103GN13 is a semi-automatic, large-frame AR platform built specifically for 3-Gun competition and high-volume target shooting. It is not a general-purpose hunting rifle or a compact home-defense carbine; rather, it is a dedicated match-ready firearm for shooters who compete in multi-gun events where speed, magazine capacity, and recoil management are critical. This model is also well-suited for long-range target shooters who prefer the .308 Win cartridge’s ballistics and want a rifle that can keep up with rapid fire stages. Collectors may appreciate the AR-10A lineage, but the primary audience is the competitive shooter who values a factory-built rifle that requires minimal modification to be stage-ready.
Key Specifications
- Caliber: .308 Winchester (7.62x51mm NATO compatible)
- Barrel Length: 13.5 inches (with a 1:10 twist rate, chrome-lined for durability)
- Overall Length: Approximately 36 inches (collapsible stock dependent)
- Weight: Approximately 8.5 pounds (unloaded, as configured)
- Magazine Capacity: 25 rounds (includes one magazine)
- Stock: MBA-1 adjustable stock (collapsible with a cheek rest)
- Finish: Black anodized aluminum receiver and handguard
- Handguard: 12-inch free-floating M-Lok rail for accessory mounting
- Sights: Flip-up front and rear backup iron sights (adjustable for windage and elevation)
- Muzzle Device: A2-style flash hider (threaded 5/8×24 for suppressor or compensator attachment)
- Trigger: Single-stage, mil-spec trigger (approximately 6-7 lb pull weight)
- Gas System: Mid-length direct impingement with a low-profile gas block
Feature Deep-Dive
The 13.5-inch barrel is one of the most distinctive features of this AR-10A. While many .308 Win competition rifles use 16- to 18-inch barrels for velocity, the shorter length here is a deliberate choice for 3-Gun stages that require rapid transitions between targets and movement through obstacles. The chrome-lined bore resists fouling and extends barrel life under high-round-count conditions, which is a practical consideration for shooters who fire hundreds of rounds per month. The 1:10 twist rate stabilizes standard 147- to 175-grain .308 Win bullets, giving you consistent accuracy at ranges out to 600 yards without over-stabilizing lighter match loads.
The MBA-1 stock is a notable upgrade from standard carbine stocks. It features a collapsible design with a positive-locking adjustment, allowing you to set the length of pull for different shooting positions—prone, kneeling, or standing. The integrated cheek rest provides a consistent cheek weld, which is important when using optics or magnified sights. This stock also includes a built-in recoil pad, which helps manage the .308 Win’s recoil during rapid fire strings. It is not a fully adjustable target stock, but for a competition rifle in this price range, it offers a solid balance of weight savings and ergonomic support.
The free-floating M-Lok handguard is another component that directly affects accuracy. By not contacting the barrel, it minimizes the impact of sling tension or bipod pressure on point of impact. The 12-inch length provides ample space for mounting a bipod, a vertical grip, or a light, though this rifle is not intended for close-quarters tactical use. The handguard’s M-Lok slots are compatible with a wide range of aftermarket accessories, and the top Picatinny rail allows for secure mounting of a red dot, LPVO, or traditional scope. For competition shooters, this means you can configure the rifle to your preferred sight system without needing to replace the handguard.
Reliability in a .308 Win AR platform can be a concern due to the higher pressures and longer bolt travel, but the AR-10A uses a proven direct impingement gas system with a mid-length gas tube. This setup reduces bolt carrier speed compared to a carbine-length system, which helps with consistent ejection and extraction. The low-profile gas block is pinned in place, reducing the chance of it shifting under heat or vibration. The bolt carrier group is machined from 4140 steel and features a chrome-plated carrier for easier cleaning—a practical detail for shooters who maintain their own rifles after a long day at the range.
The trigger is a mil-spec single-stage unit. It is not a match-grade trigger, but it is serviceable for competition use out of the box. Many shooters will choose to upgrade to a drop-in trigger for a lighter pull and cleaner break, but the factory trigger is consistent enough for zeroing and general target work. The rifle ships with a standard A2 flash hider, which is functional for reducing muzzle rise during rapid fire. If you plan to use a suppressor or a compensator, the 5/8×24 threading is a common standard, and the barrel’s shoulder is properly indexed for timing muzzle devices.
Finally, the 25-round magazine is a significant advantage for 3-Gun stages that require high round counts. Standard AR-10 magazines typically hold 20 rounds, so the extra five rounds can mean one less reload during a stage. The magazine is made from a durable steel body with a polymer follower, and it feeds .308 Win ammunition reliably. It is not compatible with DPMS-pattern AR-10 magazines, so you will need to purchase spares specifically for the AR-10A platform. The magazine release is oversized for easier operation under time pressure, and the bolt catch is standard AR-10 pattern.
Ideal Use Cases
This rifle is purpose-built for 3-Gun competition. The short barrel, high magazine capacity, and recoil-managing stock make it a strong choice for shooters who compete in Open, Tactical, or Heavy divisions. It is also suitable for high-volume target shooting at ranges where .308 Win is allowed, such as private clubs or public ranges with steel targets rated for rifle calibers. For hunting, the .308 Win is a capable cartridge for white-tailed deer, hogs, and similar game at moderate ranges, but the 13.5-inch barrel will reduce muzzle velocity by about 100-150 fps compared to a 16-inch barrel, which may affect ethical shot distances. This rifle is not recommended for concealed carry or home defense due to its size and weight. It can serve as a range toy for collectors or enthusiasts who appreciate the AR-10 platform, but its primary value is in competition.
Compatibility Notes
Ammunition: This rifle is chambered for .308 Winchester and will also safely fire 7.62x51mm NATO ammunition. It is not compatible with .243 Win, .260 Rem, or other calibers without a barrel and bolt change. Stick to factory-loaded ammunition within SAAMI pressure specs for best reliability.
Holsters: This is a full-size rifle; holsters are not applicable. For transport, use a soft or hard rifle case designed for AR-10 platforms with the stock collapsed.
Magazines: Use only AR-10A (Armalite pattern) magazines. DPMS-pattern, LR-308, or SR-25 magazines will not fit without modification. Spare 25-round magazines are available from Armalite and select aftermarket manufacturers.
Accessories: The M-Lok handguard accepts standard M-Lok accessories (rails, grips, bipods). The top Picatinny rail accepts any scope mount or red dot base with a Picatinny interface. The muzzle threads (5/8×24) are compatible with most .30-caliber suppressors and compensators. The MBA-1 stock accepts standard AR-15 buffer tubes, but the buffer and spring are specific to the AR-10A’s recoil system.
Frequently Asked Questions
1. Can this rifle be shipped directly to my home in the U.S.?
No. Per federal law, this rifle must be shipped to a Federal Firearms License (FFL) holder in your state. We ship to all 50 states where the rifle is legal, and we will coordinate with your chosen FFL to ensure a smooth transfer. You will need to provide a copy of your FFL’s license before we ship.
2. How does the FFL transfer process work?
After you place your order, we will contact you to confirm your selected FFL dealer. You must arrange with the dealer to accept the transfer. We ship the rifle to the dealer, and you complete the ATF Form 4473 and a background check at the dealer’s location. The dealer may charge a transfer fee (typically $25-$75). We do not charge any additional transfer fees on our end.
3. Is this rifle compatible with surplus 7.62x51mm NATO ammunition?
Yes. The AR-10A is designed to safely fire both .308 Winchester and 7.62x51mm NATO ammunition. Surplus NATO ammunition may have harder primers, but the rifle’s firing pin and hammer spring are sufficient for reliable ignition. Note that surplus ammunition may be less accurate than commercial .308 Win match loads.
4. What is the warranty on this rifle?
Armalite provides a limited lifetime warranty to the original purchaser. The warranty covers defects in materials and workmanship. It does not cover damage from misuse, improper ammunition, or unauthorized modifications. If you experience a defect, contact Armalite directly with your proof of purchase. We can assist with warranty claims if you purchased from us.
5. What is your return policy for firearms?
All firearm sales are final. We inspect every rifle before shipment to ensure it meets factory specifications. If the rifle arrives damaged due to shipping, you must contact us within 48 hours of delivery with photos. We will work with the carrier to resolve the issue. For functional issues covered under warranty, we will facilitate a return to Armalite for repair or replacement.
Closing Call to Action
The ARMALITE AR-10A 3 GUN RIFLE AR103GN13 is available now for U.S.
Reviews
There are no reviews yet.