Seekins Precision 0011710455-F Havak PH3 375 H&H 24" Black Fluted Threaded Barrel, Black Picatinny Rail Steel Receiver, Adj Cheek Riser Woodland Shadow Synthetic Stock

The Seekins Precision Havak PH3 in 375 H&H is a purpose-built rifle for long-range hunters and precision shooters who demand reliability without compromise. This isn't a cookie-cutter rifle—it's engineered from the ground up with the kind of thoughtful features that separate a tool you enjoy using from one you merely tolerate. The PH3 action is the centerpiece: a new 3-lug bolt design with a 60-degree throw that cycles faster and smoother than its predecessors, while toolless bolt disassembly means you can swap calibers or field-strip for cleaning without special tools or guesswork.

Built on a steel receiver with an integrated 20 MOA Picatinny rail and full-length M-Lok rail, the PH3 gives you mounting options and ergonomic real estate that modern long-range work demands. The adjustable cheek riser lets you dial in your sight picture without shims or permanent modifications—a simple feature that makes a huge difference in comfort and precision. Your barrel is 416R stainless steel, 24 inches, fluted to reduce weight without sacrificing stiffness, and threaded 5/8x24 for suppressors or muzzle devices. The Woodland Shadow synthetic stock handles hard use and weather with minimal fuss, while the TriggerTech trigger breaks cleanly and adjusts from 2.5 to 5 pounds to match your preference.

The PH3 action is interchangeable with Seekins M3 chassis and stocks, opening a path to reconfigure your rifle as your needs evolve. The quick-change barrel system uses open-source headspace and tenon specs, so you're not locked into proprietary components. In 375 H&H, you're working with a magnum rifle suited to dangerous game, big elk, or extreme-distance hunting where the cartridge's energy and ballistics matter. This is a rifle built for hunters and shooters who understand that a good platform is worth the investment.

Key Features

• New 3-lug bolt design with 60-degree throw for smooth, fast cycling
• Toolless bolt disassembly for caliber changes and field cleaning
• Integrated 20 MOA Picatinny rail and full-length M-Lok rail
• Adjustable cheek riser for custom sight picture without permanent modification
• 416R stainless steel, fluted, threaded barrel (5/8x24)
• TriggerTech user-adjustable trigger (2.5–5 lbs)
• Seekins carbon composite stock in Woodland Shadow finish
• Interchangeable with Seekins M3 chassis and stocks
• Quick-change barrel system with open-source specs

Specifications

Frequently Asked Questions

Can I change barrels or calibers on the Havak PH3?

Yes. The PH3 features a quick-change barrel system with open-source headspace and tenon specifications, and the bolt disassembles without tools for caliber swaps or cleaning. The action is interchangeable with Seekins M3 chassis and stocks, so you have upgrade paths as your needs evolve.

What trigger comes on the PH3?

The Havak PH3 is equipped with a TriggerTech trigger that is user-adjustable and breaks cleanly. You can set it anywhere from 2.5 to 5 pounds to suit your shooting style and preferences.

Is the cheek riser adjustable?

Yes. The PH3 includes an adjustable cheek riser (comb) that lets you fine-tune your sight picture and head position without shims or stock modifications. This is especially valuable if you use optics with varying heights or if you shoot prone and standing.

What does the Picatinny rail setup look like on the PH3?

The receiver features an integrated 20 MOA Picatinny rail for mounting scopes, and a full-length M-Lok rail runs the length of the handguard, giving you plenty of options for mounting accessories, lights, or tactical gear.