Estimated reading time: 14 minutes
Born from a special operations requirement, the Seekins Precision SIC is a true interchangeable caliber rifle that stays sub-MOA, shrugs off heat, and drives recoil straight back so you can spot your own hits.
First Look: Mission-Built Precision That Doesn’t Flinch
The Seekins Precision SIC rifle is one of the most forward-thinking precision rifle systems currently available. It was designed and manufactured specifically for submission under a highly specialized special operations contract, and that origin shows in every engineering decision. This is not a conventional chassis rifle, nor is it simply a refined bolt gun. It is a fully integrated modular weapon system built around rigidity, repeatability, serviceability, and recoil control at extreme distances.
The SIC name stands for Seekins Interchangeable Caliber, and unlike most rifles that use that phrase loosely, the SIC delivers true caliber modularity without compromise. One receiver can support short action cartridges all the way up to .338 Lapua Magnum, with dedicated components engineered for each configuration rather than adapters or workarounds.
Table of contents
- First Look: Mission-Built Precision That Doesn’t Flinch
- Watch It Run: SIC Video Overview
- Receiver Built Like a Vault for Repeatable Accuracy
- True Interchangeable Caliber System, Not a Gimmick
- Slick Bolt, Light Lift: Built for Speed
- Magazines That Mean Business
- TriggerTech Feel, Ambi Safety You Ride Like a Shelf
- Rock-Solid Folder: Locks Like a Fixed Stock
- Carbon Barrel, ARCA Handguard, Built to Work Hot
- Cold, Snowy, Still Sub-MOA: Real Group Data
- Recoil Control You Can See Through
- Accessories Used on This Rifle
- Scope Mount
- Suppressor
- Suppressor Cover
- Bipod
- Final Verdict: Mission-Built Precision That Delivers
- Seekins Precision SIC Rifle Specifications
- Pros and Cons After Real Range Time
- Related Reads from GunsAmerica Digest
Watch It Run: SIC Video Overview
Receiver Built Like a Vault for Repeatable Accuracy
At the heart of the SIC is a one-piece steel receiver that integrates the action and the optic mounting interface into a single rigid structure. There are no action screws, no bedding surfaces, and no traditional chassis interfaces that can introduce movement or inconsistency. The optic rail is machined directly into the receiver and includes 20 MOA of built-in cant, which eliminates the need for aftermarket scope bases and preserves alignment under recoil.
This approach removes several common failure points found in traditional precision rifles. There is no opportunity for bedding shift, torque inconsistency, or flex between components. The barrel, optic, and bolt all reference the same rigid structure, which directly contributes to the rifle’s repeatable accuracy.
The receiver is intentionally overbuilt. It is designed to handle modern high-pressure cartridges and was engineered with extensive safety margins. Pressure relief ports are integrated into the action, and the system has been destructively tested well beyond normal operating pressures. In the event of a catastrophic ammunition failure, the action is designed to contain the event rather than transmit energy back toward the shooter.
True Interchangeable Caliber System, Not a Gimmick
The SIC is a true modular rifle, not just a quick-change barrel system. Each caliber configuration consists of a matched barrel, bolt head, magazine well, and magazine. This ensures proper feeding geometry, bolt engagement, and pressure handling for each cartridge.
Barrel changes are straightforward. A captured locking system allows the barrel to be loosened and removed without specialized tools, although wrench flats are machined into the barrel for added leverage if needed. The system maintains consistent headspace and alignment, and barrels can be swapped in the field if required.
The bolt head is also user-replaceable and can be removed without tools. This allows the rifle to transition between different case head sizes quickly while maintaining proper extraction and ejection.
Slick Bolt, Light Lift: Built for Speed
The SIC uses a three-lug bolt with a 60-degree throw. Bolt lift effort measures approximately 4.5 pounds, which is exceptionally light for a rifle capable of handling .338 Lapua pressures. For comparison, a competing system from Accuracy International typically requires around 12 pounds of bolt lift. The difference is immediately noticeable during rapid follow-up shots or extended shooting sessions.
The bolt is fully toolless for disassembly. It can be broken down to the firing pin assembly by hand, allowing cleaning or maintenance in the field without a bench or specialized tools. Dual ejectors are used, and they are intentionally small to prevent brass flow under high pressure conditions.
Magazines That Mean Business
One of the most impressive features of the SIC is its magazine system. In .338 Lapua Magnum configuration, the rifle feeds from a double-stack 12-round magazine. That capacity is extremely uncommon for a magnum precision rifle and provides a significant advantage for both competition and operational use.
The magazine well is retained by two push pins, allowing it to be swapped quickly when changing calibers. The magazine release is a large paddle located forward of the trigger guard, positioned so it can be activated without placing a finger inside the trigger area. Retention tension is deliberate and secure, preventing accidental magazine release while moving.
TriggerTech Feel, Ambi Safety You Ride Like a Shelf
The SIC uses a Remington 700 footprint trigger and ships with a TriggerTech unit installed. The trigger assembly itself is retained by the same push-pin system as the magazine well, allowing it to be removed and replaced in seconds. If a trigger becomes fouled or damaged, it can be serviced or swapped in the field.
The safety system is one of the most innovative elements of the rifle. It is ambidextrous and doubles as a thumb rest. Instead of reaching up to manipulate a traditional safety, the shooter’s thumb naturally rests on the safety lever. Disengaging the safety requires only a downward press without altering grip or breaking firing position.
Despite its size, the safety is recessed into the receiver and does not protrude excessively. It does not snag on packs or gear and remains secure during movement.
Rock-Solid Folder: Locks Like a Fixed Stock
The folding stock on the SIC is exceptionally solid. When locked open, there is absolutely zero play. There is no wobble, no flex, and no loss of confidence when loading the rifle or shooting from supported positions. This is critical for a precision system, as any movement in the stock can translate directly into inconsistency at distance.
The stock folds for transport and storage and locks securely in both positions. Cheek height, cheek cant, length of pull, and buttpad angle are all adjustable without tools. Adjustments lock firmly in place once set.
The cheekpiece is carbon fiber with a foam pad that reduces cold transfer and vibration against the shooter’s face. An integrated bag rider extends with the stock so there is no gap when adjusting length of pull, preserving rear support consistency.
A Torx tool is stored inside the stock and is capable of servicing every fastener on the rifle.
Carbon Barrel, ARCA Handguard, Built to Work Hot
Seekins manufactures its own carbon fiber wrapped barrels in house. The barrel features machined flats forward of the carbon fiber section that serve multiple purposes. They allow secure barrel installation and removal, provide leverage for removing a stuck suppressor, and allow the barrel to be clamped without stressing the receiver.
The handguard is aluminum and features M-LOK slots on the sides and bottom, along with a full-length ARCA rail. The top of the handguard is machined to the same 20 MOA angle as the receiver rail. This is a critical feature for clip-on night vision and thermal devices, as it ensures proper alignment across the entire system.
Cold, Snowy, Still Sub-MOA: Real Group Data
Accuracy is where the SIC truly proves its design philosophy. Shooting multiple ammunition types back to back without cooldown, the rifle consistently produced sub-MOA five-shot groups. Even under cold, snowy conditions with significant mirage from sustained fire, groups remained tight and predictable.
The largest five-shot groups measured just over three-quarters of an inch at 100 yards and that is including shots that were called as being off. Importantly, point of impact shifts between ammunition types were consistent and predictable rather than erratic. Hornady 285 Grain, Hornady 250 grain, and then two different headstamps of 300 grain were tested. One 3-shot group was fired because we only had 3 rounds of one type of ammo.
What stands out most is that these results were achieved without treating the rifle delicately. The barrel was not allowed to cool between strings, and the suppressor became extremely hot. The process was shoot five shots, reload the magazine and shoot another five shot group with, etc. Despite this, the rifle showed no tendency to walk shots or lose zero. That consistency speaks directly to the rigidity of the receiver and the integrity of the barrel mounting system.
Recoil Control You Can See Through
Despite firing 300-grain class bullets, recoil is remarkably manageable. The rifle’s mass, bore alignment, and stock geometry work together to drive recoil straight back rather than upward. The result is a rifle that stays on target and allows the shooter to spot impacts.
When paired with a quality suppressor, recoil and muzzle blast are reduced to the point that extended shooting sessions are comfortable and controlled. The rifle does not punish the shooter, even with heavy magnum loads.I legitimately might be the most comfortable rifle I’ve ever shot.The recoil felt less than some 6.5 Creedmoors I’ve shot.
Accessories Used on This Rifle
Optic
The ATACR 7-35×56 is ideally suited to the SIC. The magnification range supports extreme distance shooting, the turrets are precise and repeatable, and the first focal plane reticle maintains accurate subtensions throughout the zoom range. The optic pairs perfectly with the SIC’s integrated 20 MOA rail. Additionaly, Nightforce currently has all of the contracts for special operations and will most likley be what is actually used on this rifle if it wins the contract.
Scope Mount
Seekins Precision HIT Scope Mount
The HIT mount provides a rigid, repeatable mounting solution with an integrated bubble level. The mount height is optimized for modern precision shooting positions and maintains alignment under recoil.
Suppressor
This suppressor is exceptionally quiet for a magnum platform and dramatically reduces recoil and muzzle blast. The locking mechanism prevents the suppressor from walking loose, even under sustained fire.I’m extremely impressed with this suppressor for both sound and recoil. I usually still wear hearing protection when shooting a suppressed rifle, but this Ultra SR was quiet enough that hearing protection wasn’t needed at all!
Suppressor Cover
The suppressor cover reduces mirage during long strings of fire and protects gear and hands from heat buildup.
Bipod
The CKYE-Pod offers exceptional adjustability and stability. It allows rapid leg deployment and articulation for uneven terrain and is widely regarded as one of the best bipods available. It’s used by special operators regularly. Check out our NASTI video on the GunsAmerica YouTube channel.
Laser Rangefinder
Maztech 15K
The Maztech 15K provides eye-safe ranging out to extreme distances and integrates applied ballistics. It also supports visible and infrared laser functions for night vision use.
Final Verdict: Mission-Built Precision That Delivers
The Seekins Precision SIC rifle is not a general-purpose bolt gun. It is a purpose-built precision system designed to meet the demands of elite users operating at the edge of ballistic performance. Its modularity is genuine, its accuracy is repeatable, and its ergonomics are thoughtfully executed.
This rifle was designed for a very specific special forces requirement, and that lineage is evident in every detail. For shooters who demand a no-compromise precision platform that can evolve with changing mission requirements, the SIC stands apart.
Seekins Precision SIC Rifle Specifications
| Category | Specification |
|---|---|
| Model | Seekins Interchangeable Caliber (SIC) |
| Design Purpose | Purpose-built modular precision rifle designed for U.S. Special Operations |
| Manufacturing | Designed, machined, assembled, and tested in Lewiston, Idaho, USA |
| Receiver | One-piece steel receiver with integrated scope base |
| Finish | FDE Cerakote |
| Weight | 15 lb 5 oz (unloaded, without optic or suppressor) |
| Overall Length | 47 inches (26-inch barrel) |
| Folded Length | 37.5 inches |
| Bolt | 3-lug, toolless removable bolt |
| Bolt Throw | 60-degree |
| Bolt Lift Effort | Approximately 4.5 lbs |
| Magazine System | Removable, caliber-specific magazine wells (tool-less) |
| Magazine Type | Double-stack for magnum calibers; short-action double-stack for .308 and 6.5 CM |
| Trigger | TriggerTech Diamond 2-stage, user adjustable |
| Safety | Ambidextrous safety selector with integrated thumb shelf |
| Barrel | Seekins carbon fiber barrel with flats for barrel changes |
| Muzzle Threads | 3/4″ × 24 |
| Rail System | Integrated 20 MOA scope base with matching full-length handguard Picatinny rail |
| Handguard | Aluminum with integrated full-length ARCA rail and M-LOK slots |
| Cheek Piece | Fully adjustable for height and cant |
| Butt Pad | Adjustable for length of pull and angle |
| Sling Mount | Integrated |
| Tool Storage | Integrated T25 tool stored in butt pad |
| Case | Custom laser-cut weatherproof hard case |
Pros and Cons After Real Range Time
- Pros: True caliber modularity, sub-MOA five-shot groups hot or cold, straight-back recoil, rock-solid folder, superb mag capacity for .338 Lapua.
- Cons: System weight favors supported shooting, caliber kits and accessories add cost, best performance requires quality glass and a can.
Related Reads from GunsAmerica Digest
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As the Editor-in-Chief of GunsAmerica, Hunt365, Decoding Darkness, and Suppressor Academy, True Pearce brings a rare blend of legal expertise, competitive shooting credentials, and deep hunting knowledge to the forefront of the firearms world. A former professional sponsored 3-Gun and Multigun competitor with multiple championships and titles, True’s shooting career began in long-range and tactical sniper matches—and he still burns powder in precision competitions, now branching into Hunter NRL.
A certified firearms instructor who has trained over 10,000 students face-to-face, True has also served on both sides of the courtroom as an attorney and currently as an elected Prosecuting Attorney. He has prosecuted and defended high-profile self-defense and firearms cases, giving him a unique, real-world perspective on the Second Amendment.
Outside the courtroom and off the range, True is a true western outdoorsman. A lifelong hunter and rancher, he rides and hunts off his own string of horses and pack animals, chasing elk, mule deer, wolves, coyotes, and anything else in season. He’s a longtime reloader, producing both precision rifle ammo and, back in the day, handloading over 40,000 rounds of 9mm and 5.56 annually for competition.
He’s also a thermal and night vision expert, known for his obsession with high-end optics, and is rarely found without a camera or a guitar nearby. Whether he’s glassing a distant ridge, reviewing cutting-edge gear, or deep in legal research, True brings passion, precision, and grit to everything he does.
Experience:
– Professional Shooter – Sponsored 3-Gun & Multigun competitor with multiple titles and a foundation in long-range and sniper/tactical matches.– Firearms Instructor – Certified instructor with over 10,000 students trained face-to-face.– Elected Prosecuting Attorney – Attorney with real-world experience defending and prosecuting self-defense and gun-related cases.– Hunter & Rancher – Horseback hunter with a working ranch, passionate about elk, deer, predator, and backcountry hunting.– Reloading & Ballistics Expert – Precision reloader and former high-volume competition handloader.– Optics Authority – Known for his deep knowledge and unrelenting standards in optics, thermal, and night vision gear.– Outdoor Creative – Avid photographer, guitar player, and outdoorsman with a sharp eye for gear and storytelling.– 2A Advocate – Committed to protecting the Second Amendment and educating Americans about their rights and responsibilities.