GRS Thumbhole, Mauser M25

• Thumbhole hunting ergonomics: The thumbhole layout gives the firing hand a relaxed, repeatable position that helps maintain control from improvised field positions as well as from a bench or shooting rest.
• Adjustable cheek piece: The built-in cheek piece adjustment makes it easier to achieve consistent eye alignment behind the scope, which supports faster sight acquisition and more stable shooting.
• Birch laminate construction: The laminate build combines rigidity with weather-resistant stability, helping the stock hold its shape and feel solid through regular hunting use.
• GRS SpeedLock adjustment: SpeedLock allows quick stock fit changes without slowing the rifle down in the field, making it practical when clothing layers or shooting positions change.
• Glass-bedding-ready design: With glass bedding specified for this inlet, the stock is set up for a precise action fit that can improve consistency and support the rifle’s accuracy potential.

About the GRS Thumbhole Series

GRS Thumbhole is the company’s first thumbhole stock and sits within the brand’s laminate hunting-stock range. It is built for shooters who want a more supportive grip shape than a conventional sporter stock, while still keeping the rifle practical for field carry and general hunting use. GRS positions the series for both hunting and range shooting, which explains its balance of ergonomic control, straightforward handling and adjustable fit.

The series is made from birch laminate with an oiled finish, giving it the dense, stable feel laminate stocks are known for while preserving a traditional wood-based appearance. A defining feature across the range is GRS SpeedLock adjustment, which allows the stock to be tailored more easily to the shooter. The Thumbhole family is offered for multiple rifle platforms and in several color options, including Brown, Green Mountain Camo, Nordic Wolf, Orange and Black. In practical terms, the series is aimed at hunters and rifle shooters who want a stock that combines classic material choice with a more controlled hand position and adjustable cheek support.

About the GRS Thumbhole, Mauser M25

The GRS Thumbhole, Mauser M25 is a laminate replacement stock made specifically for the Mauser M25 platform, with dimensions and features suited to a hunting rifle that also sees regular range use. Its thumbhole grip is the defining element: it promotes a natural wrist angle and a secure hold, which can make the rifle feel steadier during slow, deliberate shots as well as when shooting from uneven field positions. For stalking, woodland hunting and driven hunt use, that extra control helps the rifle come on target with less strain through the firing hand.

The stock uses laminate construction and weighs 1300.00 g, giving it a solid feel without pushing it out of the practical hunting category. The 390.00 mm length of pull and 40.00 mm forend width support a balanced shooting position, while the adjustable cheek piece helps the shooter maintain a more consistent head position behind an optic. That matters in real use because repeatable cheek weld is closely tied to sight alignment and shot-to-shot consistency.

This model is also specified for glass bedding, an important detail for a stock intended to support accuracy. A properly bedded action can improve fit between rifle and stock, reduce unwanted movement and help the rifle return to the same position under recoil. With a maximum caliber of .375 HH, the stock is built for serious hunting applications, yet its non-folding one-piece layout keeps the handling simple, rigid and dependable in the field.

About GRS

GRS began its brand history in 2010 in Grodås, Hornindal, Norway, growing out of a family business that started in 1983 as Grodås Møbler AS. The company focuses on rifle stocks for hunting and shooting and produces laminate, composite and aluminum chassis designs for a wide range of rifle platforms. This background is relevant because GRS approaches stock design with a strong emphasis on ergonomics, fit and practical field use rather than purely cosmetic styling.

Within the shooting market, GRS is known for product families such as Hunter Light, Sporter, Bifrost, Fenris, Warg and Ragnarok, covering traditional hunting stocks through to more competition-oriented chassis systems. The company also uses its SpeedLock adjustment system across key models, reflecting its focus on adaptable rifle fit. For laminate-stock products like the Thumbhole, GRS has built its reputation around combining traditional stock materials with modern adjustability and more supportive shooting ergonomics.

Main Features

• Manufacturer: GRS
• Series: GRS Thumbhole
• Made in: Norway
• Material: Laminate
• Weight: 1300.00 g
• Length: 740.00 mm
• Length of Pull: 390.00 mm
• Forend width: 40.00 mm
• Cheek piece adjustment: Yes
• Foldable: No
• Application: Alpine hunting, Driven Hunt, Hunting, Stalking, Woodland
• Bedding Type: Glass
• Max Caliber: .375 HH
• Added grip texture: No

Warranty

GRS provides a 5-year warranty for its rifle stocks from the date of purchase. The warranty covers defects in materials and workmanship for the original purchaser.

In the Box

• GRS Thumbhole stock
• Owner’s manual
• GRS decals