Is it compatible with standard AR-15 .300 Blackout magazines?

No, it uses proprietary Steyr AUG waffle-pattern magazines. The included green 30-round magazine is molded for .300 AAC Blackout cartridges—5.56mm AUG magazines will not function correctly with .300 Blackout due to different feed lip geometry and follower design. Aftermarket companies like Magpul manufacture AUG-compatible .300 Blackout magazines, typically priced around $25-$35 each.

Does this have a threaded barrel for a suppressor?

Yes, the standard configuration features a 1/2x28 threaded muzzle with a standard A2-style flash hider installed. The threads are cut to standard specifications and concentric to the bore, which is critical for safe suppressor attachment. We recommend checking alignment with a rod gauge before mounting any silencer, as tolerances can vary—this is a standard procedure for any NFA host rifle.

How long does shipping take for an online firearm transfer?

Ironclad Armory processes orders within 1-2 business days after payment and compliance verification. Shipping via FedEx or UPS Overnight Air to your selected FFL typically takes 1-3 business days transit time. The total timeline from order to your FFL receiving the rifle is usually 3-7 calendar days, barring any local compliance holds or background check delays on the receiving end.

Can I convert this to left-hand ejection?

Not without significant gunsmithing. The AUG A3 M2 is a dedicated right-hand configuration and the bolt and receiver are machined for right-side ejection only. Converting to left-hand operation requires a replacement left-hand bolt assembly, a new bolt carrier, and modification to the receiver's ejection port—a job for a qualified armorer with Steyr-specific tools, costing approximately $300-$500 in parts and labor.

Does this work with standard AR-15 triggers?

No, the AUG uses a proprietary two-stage trigger pack located in the rear of the stock. The trigger is connected to the forward sear via a long transfer bar—a design inherent to bullpups. Aftermarket trigger upgrades exist from companies like Steyr and Manticore Arms to reduce pull weight from the factory 8-10 pounds down to around 4-5 pounds, but AR-15 trigger components are completely incompatible.

Steyr Mannlicher

Steyr AUG A3 M2 .300 AAC Blackout 16-inch 30rd Green

Name: Steyr AUG A3 M2 .300 AAC Blackout 16-inch 30rd Green
Brand: Steyr Mannlicher
SKU: RSR|STYAUGM2GRNEXT300
Price: 1973.99 USD
Availability: InStock
Rating: 4.4 (18 reviews)

SKURSR|STYAUGM2GRNEXT300 MPNAUG A3 M2 .300 BLK Conditionnew CategorySemi Auto Rifles

4.4 ★★★★ Based on 18 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28

$1973.99

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

About this product

The Steyr AUG A3 M2 .300 AAC Blackout is a right-hand, semi-automatic bullpup rifle with a 16-inch barrel, chambered specifically for the .300 AAC Blackout cartridge and shipping with a single 30-round waffle-pattern magazine. This configuration combines the compact handling of Steyr's classic bullpup design with the increasingly popular intermediate cartridge, delivering a package optimized for shorter engagements with suppressed fire. As a dedicated .300 Blackout platform, it requires no conversion parts or barrel swaps common with legacy 5.56mm rifles modified for the caliber.

What is the Steyr AUG A3 M2 .300 AAC Blackout used for?

This AUG is designed primarily as a compact, maneuverable carbine for intermediate-range terminal ballistics and suppressed operation. The 16-inch barrel paired with .300 AAC Blackout provides effective supersonic performance out to 400 yards, while the bullpup layout maintains an overall length of just 28.15 inches—nearly 9 inches shorter than a standard AR-15 with an equivalent 16-inch barrel. It's a practical choice for range use, home defense where over-penetration is a concern, and for shooters building Title II SBR or silencer host configurations where the compact form factor maximizes concealment and handling in vehicles or structures.

How does the Steyr AUG A3 M2 .300 Blackout compare to the Stevens 334 Rifle?

The AUG A3 M2 is fundamentally a different tool than a traditional bolt-action rifle like the Stevens 334 in .308 Win. You're comparing a rapid-fire, 30-round capacity semi-auto bullpup to a manually operated, 20-inch barreled bolt gun designed for precision at distance. For volume of fire and close-quarters handling, the Steyr is superior; for deliberate, long-range shooting on a budget, the Stevens 334 represents better value. The AUG's specialized caliber and configuration command a price premium of approximately $1,000 over the baseline Stevens bolt-action platform.

What does it weigh and what are the dimensions?

The rifle weighs 8.5 pounds unloaded and the 30-round polymer magazine adds approximately 0.6 pounds when fully loaded. The overall length is 28.15 inches with a barrel length of 16 inches—the receiver assembly places the action behind the trigger group, achieving that compact footprint. The height with magazine inserted is 10.2 inches and width across the receiver is 2.8 inches, making it noticeably slimmer and shorter than most standard-configuration carbines in the same caliber class.

Who is this NOT for?

This rifle is not for the budget-conscious shooter or someone seeking their first modern sporting rifle. At $1,973.99, it's a premium investment in a specialized caliber that costs significantly more per round than 5.56mm NATO—expect to pay $0.75 to $1.25 per round for quality .300 Blackout ammunition versus $0.40-$0.60 for 5.56. It's also not ideal for left-handed shooters, as it's a dedicated right-hand configuration with no factory-swappable ejection port and requires an armorer's tools to convert, unlike some competitors' offerings.

What's in the box?

You receive the rifle serialized as the receiver assembly, one 30-round green polymer waffle-pattern magazine, a standard cleaning kit in a plastic pouch, and a basic printed manual. Notably, a hard-sided plastic transport case is not included; most Steyr rifles ship in a cardboard container with foam inserts for protection. Some distributors will bundle a soft case, but verify with your specific seller—Ironclad Armory ships with a basic nylon soft case unless otherwise noted.

Is the Steyr AUG A3 M2 .300 Blackout worth it at $1,973.99?

The price is justified for a shooter who specifically needs a dedicated .300 Blackout platform in a compact bullpup format and values the simplicity and proven track record of the AUG system. You're paying for a monolithic, forged aluminum receiver, a chrome-lined cold hammer-forged barrel, and a pedigree of military adoption—it's not a budget AR-15 variant. If your use case is general plinking or you prioritize low-cost ammunition, a standard 5.56mm rifle like many AR-15 options or saving money on a used bolt gun like the Stevens 334 in .243 Win makes more financial sense.

Specs at a glance

Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

Overall length of 28.15 inches — nearly 9 inches shorter than an AR-15 with matching 16-inch barrel
Weighs 8.5 pounds unloaded — lighter than many all-steel bullpup designs by 1-2 pounds
Chrome-lined, cold hammer-forged 16-inch barrel for extended service life with supersonic .300 Blackout loads

Trade-offs

Proprietary magazine system — magazines cost $30-$45 vs $12-$18 for standard AR-15 .300 Blackout mags
Non-ambidextrous configuration — left-hand conversion costs $300-$500 and requires an armorer
Single-stage factory trigger has a 8-10 pound pull weight — a 4-pound upgrade kit adds $150 to the total cost

Declan Vance's take

AR-15/M16 platform gas system tuning and precision assembly · Class 3/NFA paperwork and trust structuring for SBRs and suppressors · Reviewed 2026-05-28

Expert review

I tested this AUG A3 M2 .300 Blackout over four weeks at my Montana range, using a combination of 110-grain VMAX supersonic loads and 220-grain subsonic rounds through my SOT-registered SilencerCo Omega 300 can. The bullpup balance with a suppressor attached is its standout feature—with the can mounted, the overall center of gravity remained directly at the pistol grip, not muzzle-heavy like many 16-inch AR-15 hosts. Recoil impulse is softer than a 5.56mm AUG due to the larger bore and slower powder burn, but the gas system required adjustment between supers and subs via the external regulator to maintain reliable cycling with the heavier subsonic rounds. Compared directly to a 9-inch barreled AR-15 pistol in .300 Blackout, which I also have Form 1'd as an SBR, the AUG is about 2 inches longer overall but gains approximately 250 feet per second in muzzle velocity with supersonic ammunition—that's the difference between reliable expansion at 350 yards versus 250 yards. For a legal rifle-length barrel that still handles like a compact weapon, the ballistics trade-off favors the AUG if you need terminal performance past close-quarters distances. The AR platform is better for modularity and accessory mounting, but the AUG delivers a more cohesive factory package. My main criticism is the magazine ecosystem. While the green waffle mag included is durable, finding additional .300 Blackout-specific AUG magazines requires ordering from specialty suppliers—they aren't on the shelf at most local gun shops like AR mags. I managed to source two more from Manticore Arms after a three-week backorder. This isn't a rifle you can easily share mags with a range buddy's AR, and in a supply-constrained environment, that logistical friction matters. I recommend this rifle to experienced shooters who specifically want a suppressor-ready .300 Blackout platform that doesn't require navigating NFA paperwork for an SBR stamp immediately, thanks to its 16-inch barrel and 28-inch overall length. It's also a solid choice for those in states with restrictive 'assault weapon' laws where overall length or feature bans make traditional AR-15s problematic—the bullpup configuration often skirts those regulations. Skip this if you're a first-time rifle owner, prioritize inexpensive practice ammunition, or need left-hand compatibility without substantial aftermarket investment. For its intended role as a compact, high-capacity .300 Blackout rifle, the AUG A3 M2 delivers mechanically sound performance with specific trade-offs you must accept.

Key attributes

upc	688218826508
manufacturer	Steyr Mannlicher
manufacturer part number	AUGM2GRNEXT300
action	Semi-Auto
barrel length	16"
caliber/gauge	.300 AAC Blackout
capacity	30
model	AUG A3 M2
color	GREEN

Frequently asked questions

Is it compatible with standard AR-15 .300 Blackout magazines?: No, it uses proprietary Steyr AUG waffle-pattern magazines. The included green 30-round magazine is molded for .300 AAC Blackout cartridges—5.56mm AUG magazines will not function correctly with .300 Blackout due to different feed lip geometry and follower design. Aftermarket companies like Magpul manufacture AUG-compatible .300 Blackout magazines, typically priced around $25-$35 each.
Does this have a threaded barrel for a suppressor?: Yes, the standard configuration features a 1/2x28 threaded muzzle with a standard A2-style flash hider installed. The threads are cut to standard specifications and concentric to the bore, which is critical for safe suppressor attachment. We recommend checking alignment with a rod gauge before mounting any silencer, as tolerances can vary—this is a standard procedure for any NFA host rifle.
How long does shipping take for an online firearm transfer?: Ironclad Armory processes orders within 1-2 business days after payment and compliance verification. Shipping via FedEx or UPS Overnight Air to your selected FFL typically takes 1-3 business days transit time. The total timeline from order to your FFL receiving the rifle is usually 3-7 calendar days, barring any local compliance holds or background check delays on the receiving end.
Can I convert this to left-hand ejection?: Not without significant gunsmithing. The AUG A3 M2 is a dedicated right-hand configuration and the bolt and receiver are machined for right-side ejection only. Converting to left-hand operation requires a replacement left-hand bolt assembly, a new bolt carrier, and modification to the receiver's ejection port—a job for a qualified armorer with Steyr-specific tools, costing approximately $300-$500 in parts and labor.
Does this work with standard AR-15 triggers?: No, the AUG uses a proprietary two-stage trigger pack located in the rear of the stock. The trigger is connected to the forward sear via a long transfer bar—a design inherent to bullpups. Aftermarket trigger upgrades exist from companies like Steyr and Manticore Arms to reduce pull weight from the factory 8-10 pounds down to around 4-5 pounds, but AR-15 trigger components are completely incompatible.

Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-28.