The GrovTec Shotgun Locking Swivel Set for Mossberg 500 20 Gauge (GTSW90) provides dedicated two-point sling mounting hardware for field transport. Engineered as a drop-in conversion, it replaces the factory magazine takedown bolt with an integrated forward swivel stud, eliminating the need to drill into the magazine tube or barrel assembly. Built from all-steel components finished in corrosion-resistant black oxide, the kit includes a rear buttstock wood screw stud and a pair of positive-locking swivels designed to retain slings securely under recoil and rough field conditions.

Key Features

  • Drop-In Front Magazine Cap: Directly replaces the factory 20-gauge magazine takedown bolt with an integrated forward stud, avoiding modification to the firearm.
  • Positive GT™ Locking Mechanism: Utilises knurled, threaded locking sleeves on the swivels to prevent accidental opening during active field carry.
  • All-Steel Construction: Features robust steel construction with a protective black-oxide finish for all-weather corrosion resistance.
  • Complete Installation Kit: Supplies the front magazine tube bolt stud, rear wood screw stud, spacer washer, installation wrench, and a pair of locking swivels.

Specifications

  • Brand: GrovTec US, Inc.
  • Model / MPN: GTSW90
  • Platform Compatibility: Mossberg 500 (20-gauge models with removable magazine bolts only)
  • Loop Width: 1.0 inch (for 1-inch wide sling webbing)
  • Rear Stud Thread Length: 3/4" wood screw
  • Material: Steel
  • Finish: Black oxide
  • Included Hardware: Front magazine cap stud, 3/4" rear wood screw stud with spacer, 2x 1.0-inch GT™ locking swivels, spanner wrench

Who is the Grovtec Mossberg 500 20 Gauge Swivel Set 1" Loops Black for?

  • Mossberg 500 20-gauge shotgun hunters — Installs a replacement front magazine bolt and a 3/4" rear wood screw stud to provide secure two-point shoulder carry on 20-gauge shotguns without drilling the magazine tube.
  • Clay target and field shooters — Secures standard 1.0-inch sling webbing using knurled, threaded locking loops to carry 20-gauge shotguns across long trekking distances between shooting stations.

Less suitable for: Owners of 12-gauge Mossberg 500/590 or Remington shotguns, barrels with non-removable captured magazine bolts, or users running slings wider than 1.0 inch; these applications require calibre-specific magazine caps, clamp-on barrel adapters, or wider 1.25-inch tactical swivel loops.

SKU GT40896LP
Model # GTSW90
Brand Grovetec
Shipping Weight 1.0000kg

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