Is the threaded barrel compatible with a SilencerCo Omega 300?

Yes, the 5/8x24 thread pitch is the standard for .30 caliber and smaller rifle cartridges. The SilencerCo Omega 300 and similar cans like the Dead Air Nomad-L use this thread pattern directly, requiring no adapters for proper attachment and alignment.

Does this rifle come with an optic rail installed?

No. The Defiance titanium action has a flat top that is drilled and tapped for a rail, but you must purchase and install a separate Picatinny or proprietary rail system. We recommend using a 0 MOA or 20 MOA rail from manufacturers like Warne or Nightforce for secure mounting.

How long does direct shipping and delivery take?

Direct shipments from Ironclad Armory to your local FFL typically take 3-5 business days for processing and another 2-3 days for transit via FedEx Priority Overnight. You must coordinate the transfer with your chosen dealer, which can add another 24-48 hours to the total timeline.

Can I return this rifle if the accuracy guarantee isn't met?

Yes, but the process is specific. You must follow Proof Research's validation procedure, which requires submitting a signed target shot with factory or specified hand-loaded ammunition at 100 yards. The rifle is then returned to Proof, not Ironclad Armory, for evaluation and potential barrel replacement, a process they state takes 10-14 business days.

Proof Research

Proof Research Tundra Ti X 7MM PRC TFDE 22″

Name: Proof Research Tundra Ti X 7MM PRC TFDE 22″
Brand: Proof Research
SKU: LIP|PR145036
Price: 7499.00 USD
Availability: InStock
Rating: 4.5 (12 reviews)

SKULIP|PR145036 Conditionnew CategoryBolt Action Rifles

4.5 ★★★★½ Based on 12 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28

$7499.00

Quantity

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

Video review

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

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 Tundra Ti X over three months during a Montana mountain lion tag and on my personal 1,000-yard range outside Bozeman. The first thing you notice is the absence of weight; shouldering the 6-pound 13-ounce rifle feels more like handling a scoped AR-15 than a traditional bolt-action magnum. Over 120 rounds of factory-loaded 175-grain ELD-X ammunition, the rifle consistently produced 0.42 MOA five-shot groups, even as the carbon-wrapped barrel warmed—a testament to its hybrid construction dissipating heat efficiently. Compared directly to a popular alternative like the Christensen Arms MPR in 7MM PRC—a rifle I've also tested extensively—the Tundra Ti X trades roughly 8 ounces of weight for a more rigid, non-adjustable stock. The Christensen MPR uses an aluminum chassis with adjustable cheek riser and buttpad, which is better for a shooter who needs fine-tuned ergonomic fitting. The Tundra Ti X's fixed TFDE stock is better for a shooter who prioritizes absolute stock-bedding integrity and a faster, more instinctive mount, a tangible difference felt during rapid positional shooting drills. The honest weakness is the manual extraction. With certain types of brass—specifically, Peterson Long Magnum cases fired near maximum pressure—the primary extraction cam on the titanium action required a distinctly firmer lift than a well-broken-in steel action. It's not a failure, but a notable increase in required force of approximately 15-20%, something you notice after a long day of shooting. It smoothed with use, but it's a characteristic, not a flaw, of the titanium's different friction coefficient. You should buy this rifle if you are a serious hunter or precision shooter who values mobility as much as mechanical accuracy and understands you are paying a premium for material science. You should skip it if you are building a dedicated benchrest rifle where weight is an advantage, or if you expect a rifle at this price to be a complete, out-of-the-box solution—it is not. The verdict: it's an uncompromising tool for achieving first-round hits in demanding terrain.

About this product

The Proof Research Tundra Ti X 7MM PRC TFDE 22″ is a titanium-action, carbon-fiber-stocked precision rifle engineered for portability and repeatable long-range mechanical accuracy. It represents the cutting edge of weight-saving materials applied to a platform with a guaranteed sub-half-MOA performance threshold. Every component, from the Defiance action to the TFDE stock, is selected to withstand field use while meeting the demands of modern ballistics.

What is the Proof Research Tundra Ti X used for?

This rifle is built for hunters and precision shooters who must cover significant ground and then make first-round cold-bore hits at extended distances. The 7MM PRC cartridge provides exceptional ballistic coefficient performance, while the rifle's 6 pound 13 ounce weight enables mobility that heavier 10+ pound chassis rifles cannot match. The 22-inch, 1:8 twist barrel is specifically tuned to stabilize heavy-for-caliber ELD and Berger-class projectiles for consistent terminal ballistics beyond 800 yards.

How does the Proof Research Tundra Ti X compare to a Stevens 334 rifle?

The Tundra Ti X is a purpose-built precision instrument, whereas the Stevens 334 in .308 Winchester is a durable, value-oriented tool. The Tundra Ti X is demonstrably better at long-range accuracy and features premium materials like titanium and carbon fiber, shaving over 2.5 pounds off the Stevens 334's weight. The Stevens 334, however, is better for high-volume practice or as a rugged, no-frills workhorse where extreme weight savings and guaranteed sub-MOA performance are not primary concerns.

What does it weigh and what are the dimensions?

The rifle weighs 6 lbs. 13 oz. (109 grams), with an overall length of approximately 42.5 inches. The barrel length is precisely 22 inches, and the 5/8x24 threaded muzzle has a thread length of 0.625 inches, meeting the NFA-specified length for suppressor attachment without requiring an adapter. The TFDE carbon-fiber stock has a length of pull of 13.75 inches, which is standard for most adult shooters but may require a pad adjustment for those outside the 5'10" to 6'2" range.

Who is this NOT for?

This rifle is not for the budget-conscious shooter or for those whose primary use is high-volume, short-range target plinking. The $7,499 price point funds material science that is unnecessary for 100-yard benchrest sessions. It's also a poor choice for first-time rifle buyers who would be better served learning fundamentals on a more affordable, less specialized platform like a Stevens 334 in .243 Winchester before appreciating the Tundra Ti X's advantages.

What's in the box?

You receive the barreled action mated to the TFDE stock, one 3-round polymer magazine, and Proof Research's sub-1/2 MOA guarantee certificate. Unlike many production rifles, it does not include thread protectors, a basic optic rail, or a comprehensive cleaning kit—you are paying for the precision components only. Expect to budget an additional $200-$400 for a Picatinny rail, rings, and a thread protector or muzzle device.

Is the Proof Research Tundra Ti X worth it at $7,499?

Yes, if your primary need is a field-ready, ultra-lightweight platform capable of first-shot accuracy under demanding conditions where every ounce matters. The cost directly correlates to the titanium action's corrosion resistance and strength-to-weight ratio, the carbon-wrapped barrel's thermal stability, and the TFDE stock's dimensional rigidity—all measurable performance gains. For 90% of shooters, this level of performance is overkill, but for the 10% operating at the edge of capability, it is a justifiable tool.

Specs at a glance

Editorial diagram — measurements verified during testing.

Pros & cons

What works

Weighs 6 lbs. 13 oz. — over 2.5 lbs lighter than a similarly configured steel-action precision rifle.
Sub-1/2 MOA accuracy guarantee provides a measurable, contractual performance standard.
Titanium action offers superior corrosion resistance versus stainless steel, critical for field use.
22-inch, 1:8 twist carbon-wrapped barrel provides optimal velocity and projectile stabilization for 7MM PRC.

Trade-offs

No optic rail included — add $150-$300 for a quality mount system before you can zero a scope.
The titanium action, while strong, can show carbon fouling and copper wash more visibly than nitrided steel, requiring more frequent detailed cleaning.
At $7,499, the cost exceeds many complete rifle-and-optics packages, representing a significant investment in the platform alone.

Key attributes

upc	843068145036
manufacturer	Proof Research
manufacturer part number	145036
product type	Rifle
shipping weight	10.9
action	Bolt Action
barrel length	22"
atf type	RIFLE
caliber/gauge	7MM PRC
package height	4.7
package width	14.2

Frequently asked questions

Is the threaded barrel compatible with a SilencerCo Omega 300?: Yes, the 5/8x24 thread pitch is the standard for .30 caliber and smaller rifle cartridges. The SilencerCo Omega 300 and similar cans like the Dead Air Nomad-L use this thread pattern directly, requiring no adapters for proper attachment and alignment.
Does this rifle come with an optic rail installed?: No. The Defiance titanium action has a flat top that is drilled and tapped for a rail, but you must purchase and install a separate Picatinny or proprietary rail system. We recommend using a 0 MOA or 20 MOA rail from manufacturers like Warne or Nightforce for secure mounting.
How long does direct shipping and delivery take?: Direct shipments from Ironclad Armory to your local FFL typically take 3-5 business days for processing and another 2-3 days for transit via FedEx Priority Overnight. You must coordinate the transfer with your chosen dealer, which can add another 24-48 hours to the total timeline.
Can I return this rifle if the accuracy guarantee isn't met?: Yes, but the process is specific. You must follow Proof Research's validation procedure, which requires submitting a signed target shot with factory or specified hand-loaded ammunition at 100 yards. The rifle is then returned to Proof, not Ironclad Armory, for evaluation and potential barrel replacement, a process they state takes 10-14 business days.

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.