About Us


Ryan McMillan enlisted in the Navy in 2000. As a Navy Seal, he deployed to Mosul and Baghdad Iraq, Colombia and Paraguay as well as working in Afghanistan, Pakistan, Korea and others. In 2007, he co-founded McMillan Firearms Manufacturing before it was sold in late 2013. He has a degree in Physics and minor in Computational Mathematics from Arizona State University. Ryan is the co-founder and President of Grayboe.

Gregg Arthur enlisted in the USMC in 1965, served with the 1st Bn 26th Marines in Vietnam 1966/67, the 3rd battalion 28th Marines and finished his enlistment with the 24th Marines 4th Marine Division in 1971. He attended college at LCC lansing and Michigan State University. Gregg has had a diversified career in Retail, Wholesale, Manufacturing and Television and Motion Picture Production. He has been involved in the firearms industry since 1978 as a private label manufacturer of firearms cleaning products. He developed the revolutionary recoil device for the 50 caliber sniper rifle in use today by McMillan Firearms Manufacturing. Gregg is a Co-Founder of Grayboe.

The Grayboe Difference

3 reasons why Grayboe crushes the competition

Material Formulation

The key to building a perfect stock is starting with a perfect formulation. Grayboe uses composite materials with additives that have an infinite number of configurations. When we set out to design a stock, we design in characteristics like recoil absorption and advantageous strength to weight ratios among many others. We don’t take an existing formulation and make it fit a need; we take a need and formulate a material to fit that need perfectly.

Production Process

Grayboe spent two years prior to production developing a proprietary process that allows us to make high-end composite stocks for a fraction of the cost of comparable composite stocks.

Design Capabilities

When we design a stock, we start with a hand crafted physical model to maximize ergonomics. Once we have the perfect physical model, we scan the stock into an electronic format. Our team designs action inlet tooling down to the thousands of an inch to ensure a perfect fit with your barreled action and bottom metal. Every configuration of every stock is 3D printed prior to the manufacturing of the molds to ensure the stock you purchase is dimensionally and geometrically perfect.


Grayboe offers a lifetime warranty and stands behind its products 100%. If you are unhappy with our workmanship or materials, we will repair or replace your stock.

Normal wear and tear to painted stocks is not covered under warranty.

We are Grayboe Strong

Meet the people that power Grayboe


Ryan McMillan

Owner / CEO

Gregg Arthur



General Manager

Mike Semanoff

Public Relations

Blu Bentley

Product Design and Modeling

Jens Klingshirn

Photography and Graphic Design


Quality Manager

Contact Us


+1 (970) 242-6166

Sales and Technical Support for standard line products (serviced through our Master Dealer, Red Hawk Rifles).


+1 (623) 200-6440

Sales and Technical Support for custom line products as well as warranty items.



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