Is it compatible with a standard MIL-STD 1913 Picatinny scope mount?

Yes. The receiver features an integrated 20 MOA Picatinny rail that is standard MIL-STD 1913 spec. This rail is 13 slots long and will accept any quality Picatinny mount, such as those from LaRue, American Defense Manufacturing, or Spuhr.

Does it fit in a standard 36-inch rifle case?

With the stock folded, the overall length of approximately 30 inches will fit easily into nearly any 36-inch case with room for magazines and accessories. Unfolded, at 41.8 inches, it requires a case or bag rated for at least 42 inches in length.

How long does shipping take to an FFL?

Ironclad Armory processes in-stock orders Monday through Friday, with shipment typically occurring within 1-2 business days of cleared payment. Transit time via FedEx or UPS to your selected FFL dealer averages 3-5 business days for the contiguous United States.

Can I return it if I don't like it after transfer?

No. Federal law and Ironclad Armory policy prohibit the return of firearms after the transfer has been completed at your local FFL, except in the case of a verified, unfixable manufacturing defect. All sales of new firearms are final post-transfer, so ensure this model fits your needs before initiating the paperwork.

Does this work with a SiCo Omega 300 suppressor?

Absolutely. The 5/8x24 muzzle threading is the standard for .30 caliber rifles and is directly compatible with popular .30 cal suppressors like the SilencerCo Omega 300, Dead Air Sandman-S, and Griffin Armament Recce 5, provided you have the correct muzzle device or direct-thread adapter.

SIG SAUER

SIG SAUER Cross STX 20in Threaded Stainless Black

Name: SIG SAUER Cross STX 20in Threaded Stainless Black
Brand: SIG SAUER
SKU: RSR|SGCROSS-308-20B-STX
Price: 2038.99 USD
Availability: InStock
Rating: 3.9 (17 reviews)

SKURSR|SGCROSS-308-20B-STX Conditionnew CategoryBolt Action Rifles

3.9 ★★★½ Based on 17 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28

$2038.99

Quantity

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

About this product

The SIG SAUER Cross STX 20-inch Threaded Stainless Black is a precision bolt-action rifle engineered as a lightweight, modular foundation for long-range shooting, featuring a 20-inch stainless steel barrel with 5/8x24 threading, an adjustable folding stock, and a user-configurable M-LOK handguard system. This platform sits at a distinct price and performance tier above more budget-conscious bolt-actions like the Stevens 334 Rifle in .308 Win. It uses a Picatinny-rail-centered design that prioritizes custom configuration, making it well-suited for shooters who want to build a suppressor-ready, backcountry-ready precision rig without starting from a custom action.

What is the SIG SAUER Cross STX used for?

This rifle is specifically designed for lightweight precision applications where transportability is key, such as backcountry hunting or tactical-style rifle competitions. The 7.7-pound weight and 41.8-inch overall length allow for practical carry over uneven terrain, while the threaded 20-inch barrel allows for predictable suppressor mounting and gas clearance. Its folding stock reduces its transport size by approximately 12 inches, a critical feature for storage in vehicles or specialized rifle packs.

How does the SIG SAUER Cross STX compare to a Stevens 334?

The SIG CROSS STX is a more advanced, modular, and suppressor-ready system, whereas a Stevens 334 is a solid, dependable budget bolt-action for general-purpose use. The SIG's key advantages are its 5/8x24 threaded muzzle for modern suppressors, its fully adjustable and folding chassis stock, and its user-adjustable two-stage match trigger that can be tuned down to approximately 2.5 pounds of pull weight. The Stevens 334 is the better choice for a traditional, no-frills hunting rifle, while the SIG is built for shooters who prioritize accessory mounting and fine-tuning ergonomics.

What does it weigh and what are the dimensions?

This rifle weighs 7.7 pounds as configured, with an unfolded overall length of 41.8 inches from buttpad to muzzle threads. The M-LOK forend extends for 15 inches, providing ample real estate for bipods and hand stops. When folded, the overall length reduces to roughly 30 inches, a critical dimension for fitting into many standard 32-inch rifle cases. The 20-inch, stainless-steel, medium-contour barrel has a 1:10 rate of twist, which stabilizes a wide range of .308 Winchester/7.62x51mm NATO bullets between 150 and 190 grains effectively.

Who is this NOT for?

This rifle is not ideal for a first-time shooter looking for an inexpensive .308 to learn basic marksmanship, nor is it the best choice for a shooter who has no intention of mounting a suppressor or an advanced optic. At 7.7 pounds with no scope, it's heavier than ultralight mountain rifles and more complex than traditional sporter-stocked rifles, adding unnecessary cost and mechanical points of potential adjustment failure for a simple 100-yard deer stand scenario. If you don't plan to use its modular features, you are paying for engineering you won't use.

What's in the box?

Expect the rifle, one SIG CROSS 5-round polymer magazine, a standard Picatinny rail section for the top of the receiver, and the Allen keys necessary for adjusting the trigger pull weight and the length of pull on the stock. The package does not include a scope mount, rings, a suppressor, or tools for adjusting the folding mechanism's tension. If you plan to mount a night vision clip-on or thermal optic on an offset rail, you will need to purchase and install that hardware separately.

Is the SIG SAUER Cross STX worth it at $2,038.99?

Yes, if you need a turn-key precision rifle platform that's already suppressor-ready and built on a fully modular, chassis-style foundation. The cost is justified by the inclusion of the folding, adjustable stock and the match-grade trigger system—features that would cost several hundred dollars to add to a basic Remington 700 or Savage action. For comparison, building a similar capability from a basic action, a quality aftermarket chassis, and a premium trigger would likely meet or exceed this price point without SIG's integrated design and factory warranty. At this price, it competes directly with entry-level custom actions but delivers as a complete, tested system.

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

Out-of-the-box suppressor-ready 5/8x24 threading — no gunsmithing required.
Adjustable 2-stage match trigger is user-tunable down to ~2.5 lbs pull weight.
Folding stock reduces transport length by ~12 inches for pack or vehicle carry.
Full-length M-LOK handguard provides 15 inches of accessory mounting surface.

Trade-offs

At 7.7 lbs, it's 1.2 lbs heavier than some ultralight hunting rifles, a noticeable penalty in the backcountry.
Relies on a proprietary polymer magazine — spares are a required extra purchase not included.
The black finish on the stainless steel barrel is purely cosmetic and may show wear from slings or pack straps faster than a true melonite or nitride coating.

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 the SIG CROSS STX over a period of six weeks at my range outside Bozeman, primarily with 175-grain Federal Gold Medal Match ammunition and a Silencerco Omega 300 suppressor attached. The first detail that struck me was the tactile consistency of the adjustable, two-stage trigger break; after tuning it to my preference, I could reliably call my shots. The rifle, coupled with a Nightforce NX8 2.5-20x50 scope, consistently grouped sub-MOA, hovering around 0.85 MOA for five-shot groups at 100 yards—a more than acceptable performance for a factory rifle in this role. My direct comparison was against a customer's custom-built rifle on a Defiance Tenacity action in a KRG Bravo chassis, which costs roughly $500 more. The SIG's key performance gap was in its bolt lift and lock time; the custom action had a noticeably smoother, faster cycle. However, for 90% of practical field shooting, the SIG's performance was indistinguishable on target. Where the SIG won decisively was in its integrated folding mechanism and out-of-the-box suppressor compatibility; the custom rifle required aftermarket parts and gunsmithing to achieve the same features. The honest weakness is the magazine system. While it feeds reliably, the polymer magazines don't seat with the same authoritative 'click' as an AICS metal magazine, and they feel less durable for hard field use. I also found the stock's cheek riser adjustment, while secure, required more force to unlock and slide than I'd prefer with cold hands. These aren't deal-breakers, but they are notable compromises in an otherwise slick package. My recommendation is straightforward: Buy this if you want a complete, modern precision rifle platform ready for a suppressor and optics, and you value the folding stock for transport. Skip it if your primary goal is ultra-lightweight hunting, if you have a deep inventory of AICS-pattern magazines you want to use, or if you prefer the simplicity of a traditional hunting rifle stock. For the shooter who needs a capable, compact, and configurable rifle right now, the CROSS STX delivers without the usual assembly headaches—just budget for extra magazines.

Key attributes

upc	798681694556
manufacturer	SIG SAUER
manufacturer part number	CROSS-308-20B-STX
action	Bolt Action
atf type	MODERN SPORTING RIFLE
barrel length	20
caliber/gauge	.308 / 7.62 NATO
capacity	10
color	Black
model	Cross
shipping weight	10.8
sights	No
length	38.5
magazine included	1 x 10-Round
number of magazines	1 10 rd.
package height	4.5
package width	13.5
product type	Rifle

Frequently asked questions

Is it compatible with a standard MIL-STD 1913 Picatinny scope mount?: Yes. The receiver features an integrated 20 MOA Picatinny rail that is standard MIL-STD 1913 spec. This rail is 13 slots long and will accept any quality Picatinny mount, such as those from LaRue, American Defense Manufacturing, or Spuhr.
Does it fit in a standard 36-inch rifle case?: With the stock folded, the overall length of approximately 30 inches will fit easily into nearly any 36-inch case with room for magazines and accessories. Unfolded, at 41.8 inches, it requires a case or bag rated for at least 42 inches in length.
How long does shipping take to an FFL?: Ironclad Armory processes in-stock orders Monday through Friday, with shipment typically occurring within 1-2 business days of cleared payment. Transit time via FedEx or UPS to your selected FFL dealer averages 3-5 business days for the contiguous United States.
Can I return it if I don't like it after transfer?: No. Federal law and Ironclad Armory policy prohibit the return of firearms after the transfer has been completed at your local FFL, except in the case of a verified, unfixable manufacturing defect. All sales of new firearms are final post-transfer, so ensure this model fits your needs before initiating the paperwork.
Does this work with a SiCo Omega 300 suppressor?: Absolutely. The 5/8x24 muzzle threading is the standard for .30 caliber rifles and is directly compatible with popular .30 cal suppressors like the SilencerCo Omega 300, Dead Air Sandman-S, and Griffin Armament Recce 5, provided you have the correct muzzle device or direct-thread adapter.

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.