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GRS Rifle Stocks: Adjustable, Ergonomic Options by Model

GRS Rifle Stocks: Adjustable, Ergonomic Options by Model

GRS Rifle Stocks: SpeedLock Adjustability, Materials, and a Model Guide

At Bullet Central, we often help customers improve rifle fit. Many problems that show up at the range or in the field come back to the same issue: the rifle is hard to mount the same way each time. When head position changes, scope alignment changes. When length of pull is off, the shooter shifts on the stock. When those things vary, shooting becomes less repeatable.

GRS rifle stocks (also styled as “GRS Riflestocks”) focus on adjustability and ergonomics across laminate and composite/chassis models. In this guide, we’ll walk through what GRS says about adjustability (SpeedLock), how GRS divides its lineup (laminate vs composite/chassis), and what the main models are designed to do.

What GRS Means by “Adjustable”: SpeedLock

GRS explains that shooting position affects how your head sits relative to the scope. Their response is the SpeedLock system. SpeedLock is designed to let the shooter adjust cheekpiece height and length of pull with a simple button click. The stated purpose is to help the rifle fit different shooters, different clothing, and different shooting conditions.

From a buyer’s standpoint, adjustability is useful because fit is not fixed. Clothing changes across seasons. Shooting position changes across prone, bench, bipod, tripod, and field support. A stock that allows fast adjustment reduces the need to compensate with posture or head tilt.

Laminate vs Composite/Chassis: How GRS Groups Its Products

GRS organizes products into two main families:

  • Composite and chassis
  • Laminate

GRS also publishes material guidance. In their laminate vs synthetic discussion, they describe synthetic stocks as being made from materials such as fiberglass, carbon fiber, or high-tech polymers. They also explain that a composite is typically a polymer reinforced with fiber.

On the composite and chassis category page, GRS highlights a key point for buyers: “Drop-in inlets, no bedding required.” This indicates how GRS positions that category for ease of installation and use.

For laminate, GRS describes their stocks as precision-milled and hand-finished, and they state that laminate has been part of their lineup for years. In their laminate vs synthetic article, they also note that laminate can require more maintenance to keep it looking its best.

How we suggest choosing the category

  • Choose laminate if you want wood-based construction with the GRS approach to ergonomics and adjustability.
  • Choose composite/chassis if you want modern materials and, depending on model, features associated with chassis systems and accessory mounting.

Choose in 60 Seconds: Use Case First, Then Model

We find it helps to decide by use case first. Then compare the manufacturer’s published features and specifications.

  • Hunting with focus on weight: look at laminate models positioned around low weight or slimmer profiles (Hunter Light, Lightweight Classic).
  • General-purpose hunting + range work: look at an all-round laminate model (Sporter) or an adjustable composite stock (Fenris).
  • Long-range practice with accessory mounting needs: look at models that include fore-end mounting systems (Warg) or chassis options.
  • PRS-style shooting: look at chassis models positioned for that use (Ragnarok 2.0) and laminate models positioned for PRS/NRL (Loke).
  • Blaser R8 Professional: look at Ragnarok, which is presented as a chassis stock for that platform.

Composite & Chassis GRS Rifle Stocks

GRS lists composite and chassis models that include Fenris, Bifrost, Warg, Ragnarok, and Ragnarok 2.0. Below is a summary of what GRS publishes about each model.

GRS Fenris

GRS presents the GRS Fenris as an adjustable stock with a reinforced fiberglass body. They describe push-button adjustment intended to fit different body types, clothing, and shooting positions.

Published specifications include:

  • SpeedLock: Yes
  • Weight: 1.4 kg (+/- depending on inlet)
  • Max caliber listing: .375 HH
  • Length of pull range and total length as listed on the product page

How we frame it: Fenris is a composite option for buyers who want adjustability and a stock-based setup without moving into a full chassis system.

GRS Bifrost

GRS describes the GRS Bifrost as their “most adjustable and lightweight composite stock.” The product page focuses on adjustment and fit. In the specification section, GRS lists SpeedLock and also lists “Recommend to Glass Bedd: No.”

Published specifications include:

  • SpeedLock: Yes
  • Weight: 1.35 kg (+/- depending on weapon inlet)
  • Recommend to Glass Bedd: No (as written on the page)
  • Other published spec entries as listed on the product page

How we frame it: Bifrost is for buyers who want adjustability as the main goal within the composite family.

GRS Warg

GRS presents the GRS Warg as combining an adjustable stock with features of a rigid chassis fore-end. The product page highlights an M-Lok patterned aluminum forend intended to support mounting accessories.

Published specifications include:

  • SpeedLock: Yes
  • Weight: 1.35 kg (+/- depending on weapon inlet)
  • Length of pull range and total length as listed on the product page

How we frame it: Warg is for long-range builds where the buyer wants adjustable fit and a fore-end built around mounting options.

GRS Ragnarok

GRS presents GRS Ragnarok as an aluminium chassis stock for Blaser R8 Professional rifles. The product page highlights push-button adjustability and a standard folding mechanism for transport and access for cleaning/maintenance.

GRS also describes chassis features including an M-Lok forend and top Picatinny, and gives examples of mounting a bipod and devices such as night vision or thermal equipment.

How we frame it: Ragnarok is the model to look at if you have an R8 Professional and want a folding chassis platform with adjustability and modern mounting systems.

GRS Ragnarok 2.0

GRS describes GRS Ragnarok 2.0 as a next-generation chassis for long-range and PRS-style shooting. The product page lists features that include a folding stock, an integrated Arca rail, and an M-Lok fore-end. GRS also notes it is designed for short-action double-stack AICS magazines.

How we frame it: Ragnarok 2.0 is a chassis option for buyers who want PRS-style features such as Arca integration and a platform designed around positional shooting needs.

Laminate GRS Rifle Stocks

GRS also offers laminate models and describes these stocks as precision-milled and hand-finished. Below are the laminate models included in the source list provided.

GRS Sporter

GRS positions the GRS Sporter as an all-round laminate model and highlights SpeedLock adjustability and ergonomics. The product page also discusses stock fit and consistency during recoil.

Published specifications include:

  • SpeedLock: Yes
  • Weight: 1.4 kg
  • Max caliber listing: .375 HH
  • Length of pull range and total length as listed on the product page

How we frame it: Sporter is a laminate option for buyers who want one stock that covers a wide range of use cases.

GRS Hunter Light

GRS presents the GRS Hunter Light as a model for hunters focused on low weight. GRS states that length of pull is adjusted using lightweight spacers. They also state the Hunter Light is 25% lighter than the GRS Sporter model and has a 5% scaled-down grip and length of pull, and they describe it as their shortest and slimmest stock offering.

Published specifications include:

  • SpeedLock: Yes (as listed on the product page)
  • Weight: 1.05 kg (+/-5% depending on inlet)
  • Total length and other spec entries as listed on the product page

How we frame it: Hunter Light fits buyers who want a laminate stock but need a lighter setup and spacer-based LOP adjustment.

GRS Thumbhole

GRS describes the GRS Thumbhole as a birch laminate stock with an oiled finish and adjustable features. The product page includes a fit note: it is made for standard slim barrel channels like the Hunter Light.

Published specifications include:

  • SpeedLock adjustment: Yes
  • Weight: 1.3 kg (+/-5% depending on weapon system)
  • Length of pull range and other spec entries as listed on the product page

How we frame it: Thumbhole is for buyers who want a thumbhole layout and want the manufacturer’s barrel channel note stated up front.

GRS Lightweight Classic

GRS positions the GRS Lightweight Classic around weight-conscious hunting use. The product page includes a published example weight figure and also lists a specification weight with tolerance depending on inlet type. The same page also includes a manufacturer recommendation related to glass bedding.

How we frame it: Lightweight Classic is for buyers whose main requirement is keeping overall stock weight down in a laminate platform.

GRS Loke

GRS describes the GRS Loke as an ambidextrous laminate stock positioned for long-range, PRS, and NRL shooting. The product page references preparation for mounting solutions including Arca rails and the GRS Spigot, and it includes published specifications such as weight and length-of-pull range. The product page also includes a manufacturer note regarding glass bedding.

How we frame it: Loke is for buyers who want a laminate stock but are building for competition-style long-range shooting and want mounting readiness described by the manufacturer.

A Build Example from GRS: “Start Long Range Shooting”

GRS published a “start long range shooting” article that includes a build example using a GRS Warg stock. The article lists the equipment used (rifle, optic, bipod, bag rider, ammo, and ballistic tool) and gives context for how GRS frames the stock as part of a long-range setup.

We view this type of article as useful for buyers who are trying to understand how stock choice fits into a full system. It also helps clarify whether the buyer’s priorities are fit adjustments, mounting options, or both.

Installation: What GRS Recommends

GRS provides a short installation overview: move the action from the old stock into the GRS stock and torque it. They recommend owning a torque wrench and they mention Fix It Sticks as a tool solution they like.

A Simple Buying Checklist

Before purchasing a GRS rifle stock, we recommend confirming the items below directly on the model page you plan to buy:

  • Inlet / action compatibility: confirm the inlet matches your rifle model as listed on that product page.
  • Barrel channel notes: confirm any notes like “standard slim barrel channels” where applicable (for example, GRS notes this on the Thumbhole model page).
  • Adjustment method: confirm whether the model uses SpeedLock and how LOP adjustment is handled (SpeedLock or spacers, depending on the model page).
  • Glass bedding notes: some pages include a recommendation or note about glass bedding; confirm what your chosen model page states.
  • Mounting features: if you need M-Lok, Arca, top Picatinny, or other features, confirm what is listed on the specific model page.

FAQ (Based on GRS’s Published Information)

What is SpeedLock?

GRS describes SpeedLock as a system designed to allow quick adjustment of cheekpiece height and length of pull using a simple button click.

Why does cheekpiece and length-of-pull adjustment matter?

GRS explains that different shooting positions change how your head sits relative to the scope. Adjustment is intended to help fit different shooters, clothing, and shooting conditions.

Do GRS composite/chassis stocks require bedding?

On the composite and chassis category page, GRS states: “Drop-in inlets, no bedding required.” Individual product pages may also include notes regarding glass bedding recommendations, so we suggest checking the specific model page.

Does GRS offer both laminate and composite/chassis models?

Yes. GRS lists laminate stocks as a product category and also lists composite/chassis stocks as a separate category.

How does GRS describe installing a rifle stock?

GRS describes moving the action from the original stock into the GRS stock and torquing it. They recommend having a torque wrench and mention Fix It Sticks as a tool solution they like.

References

Feb 4th 2026 Rael Harris

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