Will the GrovTec GTSW37 swivel set fit my Mossberg 500 20-gauge shotgun?

No, the GTSW37 is strictly engineered for Mossberg 500 12-gauge models. If you have a 20-gauge variant, you will need the GrovTec GTSW90 model instead, while Mossberg 590 or 835 models require the GTSW38.

What sling width is compatible with the included 1-inch loops in this set?

This set includes a pair of 1.0-inch (25.4 mm) detachable locking swivels. Slings measuring 1-1/4 inches or wider are incompatible with these loops and would require separate 1.25-inch swivels such as the GrovTec GTSW02.

Does installing this swivel set on my Mossberg 500 require drilling into the barrel?

No drilling is required for the front installation, as the set features a custom magazine tube cap bolt that directly replaces your factory cap. The rear stock installation utilizes a standard 3/4-inch wood screw swivel stud.

Are there any Australian electrical or compliance certifications required for this product?

No, this is a purely passive, all-steel mechanical accessory with a black-oxide finish. As it contains no electrical components, 240V compatibility and Australian SAA or RCM compliance certifications do not apply.

Shotgun Swivel Set - GrovTec GTSW37

The GrovTec Mossberg 500 12 Gauge Swivel Set (MPN: GTSW37) provides a dedicated hardware solution for mounting a carrying sling to a 12-gauge Mossberg 500 pump-action shotgun. Engineered to replace the factory front magazine cap bolt, it installs directly onto the magazine tube assembly without requiring drilling into the barrel or magazine tube. Built from all-steel components with a corrosion-resistant black-oxide finish, this set includes a pair of 1.0-inch (25.4 mm) detachable locking swivels and a standard rear wood screw stud for the buttstock.

Key Features:

Direct-Fit Magazine Cap: Custom front magazine tube cap bolt threads directly into 12-gauge Mossberg 500 assemblies, eliminating the need for permanent firearm modifications.
Positive Locking Mechanism: GrovTec GT locking sleeves prevent accidental detachment under heavy 12-gauge recoil and field movement.
All-Steel Construction: Machined from steel with a black-oxide finish to resist wear, corrosion, and field weather.
Close-Tolerance Machining: Minimises mechanical play and metal-on-metal rattle for quiet operation during stalks.
Complete Hardware Kit: Includes the front magazine cap bolt with integrated stud, a 3/4-inch rear wood screw stud, synthetic spacer washers, and two 1.0-inch locking swivels.

Specifications:

Product: GrovTec Shotgun Locking Swivel Set for Mossberg 500
Model Number: GTSW37
Firearm Compatibility: Mossberg 500 chambered strictly in 12 Gauge
Sling Loop Width: 1.0 inch (25.4 mm)
Rear Stud Type: 3/4 inch wood screw swivel stud
Material: All-steel construction
Finish: Black-oxide

Who is the GrovTec Mossberg 500 12 Gauge Swivel Set 1" Loops Black for?

Mossberg 500 12-gauge waterfowl and turkey hunters — requires a direct-fit front magazine bolt and a 3/4-inch rear wood screw stud to mount standard 1.0-inch (25.4 mm) slings without altering or drilling the 12-gauge barrel.
Feral pest control shooters carrying shotguns across rough terrain — uses heavy-duty steel locking swivels sized for 1.0-inch (25.4 mm) webbing to carry 12-gauge long guns hands-free over extended distances.

Less suitable for: Mossberg 500 shotguns chambered in 20-gauge, Mossberg 590 or 835 platforms, or carry setups using slings measuring 1-1/4 inch (32 mm) or wider; these configurations require 20-gauge-specific shotgun bolt sets, model 590/835-dedicated swivel hardware, or wider 1.25-inch sling swivels.

SKU	GT40902LP
Model #	GTSW37
Brand	Grovetec
Shipping Weight	1.0000kg

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Grovtec Gtsw37 Mossberg 500 Swivel Set 1 Inch Loops Black

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