GRS Accessory Flush Cup M-Lok

• M-Lok QD sling interface: Adds a flush cup for push-button quick-detach sling swivels, giving a clean and secure attachment point without adding unnecessary bulk to the rifle.
• Flexible mounting position: Installs where needed on the fore-end of a chassis stock, making it easier to place the sling exactly where it best supports carry, transitions, or positional shooting.
• A4 stainless steel construction: The heavy-duty steel body is built for repeated sling use and field handling, helping the mount stay dependable under regular hunting or range use.
• Black Oxide finish: The dark finish keeps the accessory visually discreet on black rifle setups while adding surface protection suited to outdoor conditions.
• Broad rifle compatibility: Designed for use on GRS stocks as well as AR and chassis systems with M-Lok slots, so it fits naturally into a wide range of modern rifle builds.

About the GRS Accessories Series

GRS Accessories is the brand’s supporting range for shooters who want to adapt a rifle setup to a specific task rather than leave it in a fixed configuration. In the 2026 GRS catalogue, the series is presented as a collection of current shooting accessories and extra options that expand how compatible rifles can be carried, stabilized, and equipped. The lineup covers practical add-ons such as bipods, Arca rails, spigots, Picatinny adapters, shooting bags, recoil pads, and stock-mounting hardware.

The series is built around the same idea that defines GRS rifle furniture: improving control and usability in the field. These accessories are intended to support rifle setup, shooting stability, and attachment of compatible equipment, whether the rifle is used for hunting, range work, or more specialized positional shooting. Across the range, the emphasis is on straightforward mounting solutions and compatibility with modern stock and chassis layouts. That makes the series particularly relevant for shooters using modular rifles who need practical attachment points for slings, bipods, tripods, barricade devices, or other support equipment.

About the GRS Accessory Flush Cup M-Lok

The GRS Accessory Flush Cup M-Lok is a compact sling-mounting solution for rifles that use an M-Lok fore-end. Its job is simple but important: it creates a secure flush cup interface for push-button QD sling swivels, allowing the rifle to be carried, supported, or staged with a cleaner and more adaptable setup than a fixed sling loop. Because it mounts directly where needed on the fore-end, the shooter can place the attachment point to suit the rifle’s balance and the intended use, whether that means practical field carry or a more stable supported position.

The body is made from A4 stainless steel with a Black Oxide finish, a combination that suits a hard-use accessory exposed to repeated loading from sling tension, movement, and general handling. Its compact size helps keep the rifle streamlined, while the flush design reduces snagging compared with more protruding hardware. GRS also describes it as a heavy-duty flush cup, which fits its role on rifles that may be carried over distance or used with modern support techniques.

Compatibility is another strength of this model. It can be used on GRS stocks, AR platforms, and other chassis systems with M-Lok slots, and it is recommended for the GRS Ragnarok and GRS Warg stocks. For shooters building a practical hunting or precision rifle setup, it adds a durable QD sling point without complicating the forend.

About GRS

GRS traces its roots to 1983, when the family business began as Grodås Møbler AS, a furniture manufacturer. The GRS brand itself started in 2010 in Grodås, Hornindal, Norway, and GRS Riflestocks AS remains headquartered in Hornindal. The company focuses on rifle stocks for hunting and shooting, with product lines that include Hunter Light, Sporter, Bifrost, Fenris, Warg, and Ragnarok.

Its expertise centers on ergonomic rifle furniture in laminate, composite, and aluminum chassis formats, giving it a strong position in both hunting and precision-oriented shooting equipment. GRS began making laminate rifle stocks in 2011 and has developed a reputation for practical adjustability, including its GRS SpeedLock adjustment system used on its rifle stocks. That background is directly relevant to accessories such as the Flush Cup M-Lok, which are designed to integrate with modern GRS stock and chassis platforms while also fitting broader rifle systems.

Main Features

• Manufacturer: GRS
• Series: GRS Accessories
• Accessories for: Rifles
• Color: Black
• Material: A4 stainless steel Black oxide
• Weight: 0.04 lb (20 grams)
• Length: 1.38 in (35mm)
• Width: 0.61 in (15 mm)
• Fits models: Ragnarok & Warg

Warranty

GRS provides a 2-year warranty for this accessory. This stated warranty period covers the product with a clear, defined term rather than an open-ended policy.