Will the GrovTec G-Stop mount directly to standard Picatinny or KeyMod rails on my hunting rifle?

No, the GTHM321 model is designed strictly for standard M-LOK attachment slots and occupies approximately 2 inches of rail space. It will not mount directly to KeyMod or Picatinny rails unless you use third-party adaptors.

How does the reversible design function in the field during dynamic shooting or hunting?

The GrovTec G-Stop features a dual-orientation design that can be flipped 180 degrees to suit your needs. Facing rearward, it acts as an ergonomic hand stop to provide a consistent index point for your support hand and prevent slipping; facing forward, its textured vertical face locks solidly against barricades or vehicle rests for improved stability.

What are the physical dimensions and weight of the G-Stop when mounted on a lightweight chassis?

Precision CNC-machined from 6061 billet aluminum with a Type III Hardcoat Black Anodized finish, the installed unit weighs under 1.0 oz (approximately 28 g) and protrudes 1.25 inches below the rail profile. This ultra-low-profile footprint minimises added bulk during multi-day carry in outback conditions.

Are there any Australian regulatory restrictions or electrical certifications required for purchasing this hand stop?

As a fully mechanical firearm accessory constructed from anodized aluminum, the GrovTec G-Stop does not require electrical compliance such as SAA/RCM certifications or 240V compatibility. Hand stops are generally unrestricted across most Australian jurisdictions when fitted to legally registered sport-shooting or hunting platforms, though state-level cosmetic and foregrip regulations may vary.

M-LOK Hand Stop - GrovTec GTHM321

The GrovTec G-Stop (MPN: GTHM321) is a dual-orientation, low-profile rifle accessory engineered to mount directly to M-LOK handguards and chassis systems. Precision CNC-machined from 6061 billet aluminum with a Type III Hardcoat black anodized finish, the unit functions as both a support-hand index stop and a forward barricade brace. It occupies approximately 2 inches of rail space and extends 1.25 inches (approximately 31.8 mm) below the handguard profile, adding an installed weight of under 1.0 oz (~28 g). Its reversible mounting footprint allows shooters to switch between a contoured hand stop for consistent grip indexing and recoil management, or a flat, textured vertical face for bracing against competition ports, barricades, and field rests.

Key Features

Reversible Dual-Orientation Design: Can be mounted facing rearward to serve as an ergonomic hand stop for consistent grip indexing, or flipped 180 degrees forward to provide a flat, textured barricade stop for positional shooting stability.
Compact Profile: Protrudes only 1.25 inches (~31.8 mm) beneath the rail, minimizing snag points and handguard bulk compared to standard vertical foregrips.
Lightweight Billet Construction: Machined from solid 6061 billet aluminum with a durable Type III hardcoat anodized finish, keeping added rail weight under 1.0 oz (~28 g).
Direct M-LOK Attachment: Fastens directly into standard M-LOK slots using the included steel T-nuts, screws, and installation Allen key, occupying approximately 2 inches of rail space.

Product Specifications

Mounting Interface: M-LOK (occupies approximately 2 inches of rail space)
Height Profile: Protrudes 1.25 inches (~31.8 mm) below the rail profile
Weight: Under 1.0 oz (~28 g) installed
Material: CNC-machined 6061 billet aluminum
Finish: Type III Hardcoat Black Anodized
Included Hardware: M-LOK T-nuts, mounting screws, and installation Allen key

Who is the GrovTec G-Stop Reversible Hand Stop / Barricade Stop for?

Precision Rifle Series (PRS) and dynamic rifle competitors — requires a rigid barricade stop that locks firmly against match ports and barricade edges while protruding only 1.25 inches (~31.8 mm) below the rail to maintain clearance in tight positional shooting ports.
Hunters and target shooters utilising M-LOK chassis systems — requires a lightweight M-LOK hand stop weighing under 1.0 oz (~28 g) and occupying approximately 2 inches of rail space to ensure repeatable forward-hand indexing without adding noticeable bulk to the rifle.

Less suitable for: Handguards utilising KeyMod or direct Picatinny interfaces without third-party M-LOK adaptors, or shooters requiring a full-palm vertical purchase, where a full-size vertical foregrip (VFG) or a wider dedicated match barricade block is better suited.

SKU	GT40836LP
Model #	GTHM321
Brand	Grovetec
Shipping Weight	1.0000kg

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Grovtec Gthm321 G-Stop Hand Stop M-Lok Aluminum

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