Seekins Precision 0011710283-F Havak PH3 300 Win Mag 22" Black Fluted Threaded Barrel, Black Picatinny Rail Steel Receiver, Adj Cheek Riser Urban Shadow Camo Synthetic Stock

The Seekins Precision Havak PH3 in 300 Win Mag is a modern, purpose-built rifle for hunters and long-range shooters who demand reliability, speed, and precision. This 22-inch fluted and threaded barrel rifle builds on Seekins' reputation for quality manufacturing with a host of features designed to work hard in the field or on the bench. The Urban Shadow camo synthetic stock with adjustable cheek riser gives you the ergonomics to shoot comfortably from various positions, while the integrated 20 MOA Picatinny rail and full-length M-Lok rail system let you mount optics and accessories exactly where you need them.

At the heart of the PH3 is Seekins' new 3-lug bolt design paired with a 60-degree throw—the fastest bolt cycle in the lineup. The action features toolless bolt disassembly, so you can break it down for cleaning or swap barrels without heading to a gunsmith. The 416R stainless steel barrel is fluted to reduce weight while maintaining rigidity, and the muzzle is threaded 5/8x24 to accept suppressors or brakes. The Trigger Tech trigger is user-adjustable between 2.5 and 5 pounds, letting you dial in the release that works best for your shooting style.

Built around an open-source headspace and tenon specification, the PH3 action is compatible with Seekins M3 Chassis and stocks, as well as Seekins Mini Chassis, giving you flexibility for future builds or configurations. The black Picatinny rail steel receiver provides a rock-solid foundation, while the carbon composite stock balances weight and durability. Extended cartridge overall length (COAL) support means you can load long for maximum velocity in 300 Win Mag—up to 3.9 inches—without compromise.

Whether you're building a hunting rifle, a long-range precision gun, or something in between, the Havak PH3 brings serious engineering and real-world functionality to the table. It's a no-compromise option backed by Seekins' reputation for attention to detail.

Key Features

• 3-lug bolt with 60-degree throw for smooth, fast cycling
• Toolless bolt disassembly for easy cleaning and barrel changes
• Integrated 20 MOA Picatinny rail for scope mounting and long-range work
• Full-length integrated M-Lok rail for accessories and attachments
• Adjustable cheek riser for consistent shooting position across optics and styles
• 416R stainless steel fluted barrel, threaded 5/8x24
• User-adjustable Trigger Tech trigger (2.5–5 lbs)
• Carbon composite stock with Urban Shadow camo finish
• Compatible with Seekins M3 Chassis and Mini Chassis
• Open-source headspace and tenon specifications for aftermarket support

Specifications

Frequently Asked Questions

Is the Havak PH3 compatible with aftermarket stocks and chassis?

Yes. The PH3 action is compatible with Seekins M3 Chassis and stocks, as well as the Seekins Mini Chassis. The open-source headspace and tenon specifications also support third-party development.

Can I change calibers on the Havak PH3?

Yes. The rifle features a Seekins Quick Change Barrel System and a toolless bolt design, so you can swap barrels and bolts (Magnum or Standard) without gunsmithing. Seekins publishes open-source headspace and tenon specs to make this process straightforward.

What comes with the trigger out of the box, and can I adjust it?

The rifle is fitted with a user-adjustable Trigger Tech trigger set between 2.5 and 5 pounds. You can adjust it to your preference without removing the trigger.

What optics and accessories can I mount?

The integrated 20 MOA Picatinny rail accepts any standard Picatinny-mounted optic. The full-length integrated M-Lok rail allows you to attach bipods, slings, lights, and other M-Lok accessories along the foregrip.