Seekins Precision SIC Review Sub-MOA Modular Rifle

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.

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.

Nightforce ATACR 7-35×56 FFP

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

Thunder Beast Ultra SR .338

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

Cole-Tac Suppressor Cover

The suppressor cover reduces mirage during long strings of fire and protects gear and hands from heat buildup.

Bipod

MDT CKYE-Pod

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

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.

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