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MDT Bolted Arca/RRS Adapter Up to 32% Off — 2 models

Special offer available for this product. Click here to see!
MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK
MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK
MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK
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MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK
MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK
2 of 2 images
MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black 103825-BLK

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Questions & Answers
What are the measurements for the 4 mounting screws -- center to center measurements between the mounting holes? Expert Answer

MDT does not provide the center to center measurements of the mounting holes for their MDT Bolted Arca/RRS Adapter. It is compatible with Magpul MOE hole spacing mounting systems commonly found on rifle chassis, stocks and handguards, including the MDT LSS, HS3, TAC21 (non M-Lok), LSS-22 and discontinued LSS-XL. I'd recommend reaching out to MDT directly for more information.

by Ethan, Gear Expert, June 27, 2022
Will it fit a standard 7 hole M4 hand guard? Expert Answer

The MDT Bolted Arca/RRS Adapter will only attach to hand guards and forends with Magpul MOE spaced tapped holes.

by Ethan, Gear Expert, June 27, 2022
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Product Info for MDT Bolted Arca/RRS Adapter

Mil-spec Type III hard-black anodized aluminum Arca/RRS adapters that attach to hand guards and forends with Magpul MOE spaced tapped holes. Features a flat profile, to allow infinite adjustment of Arca accessories along the 6 section.image

Specifications for MDT Bolted Arca/RRS Adapter:

Manufacturer: MDT
Color: Black
Additional Features: 26 drilled and tapped holes to allow proper indexing of accessories for increased consistency
Length: 6 in
Country of Origin: Canada
Finish: Mil-spec Type III hard anodized finish to stand up to repeated usage
Gun Rail: M-LOK
Fabric/Material: 6061-T6 Aluminum

Features of MDT Bolted Arca/RRS Adapter:

  • Compatible with Magpul MOE hole spacing mounting systems commonly found on rifle chassis
  • stocks and handguards
  • including the MDT LSS
  • HS3
  • TAC21 (non M-Lok)
  • LSS-22 and discontinued LSS-XL.
  • 6 of available mounting surface to fit a wide array of tripod adapters and accessories.
  • 26 drilled and tapped holes to allow proper indexing of accessories for increased consistency.
  • Rearward overhang to allow mounting on a tripod closer to the rifles centre of gravity.
  • Angled front surface to ease tripod engagement and reduce snagging.
  • Rounded edges to decrease shooter discomfort when shooting standing or unsupported.
  • 6061-T6 aluminum construction.
  • Mil-spec Type III hard anodized finish to stand up to repeated usage.
  • Compatible with RRS dovetail standard.

Package Contents:

  • MDT Bolted Arca/RRS Adapter

MDT Bolted Arca/RRS Adapter Orderable Models

List of Orderable Models

  • USED, MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black, 103825-BLK , MPN: 103825-BLK-EDEMO , Code: 3JN-WPM-BARRSA-103825-BLK-EDEMO-OB-A
  • MDT Bolt On Arca Swiss Rail Full 6 inch for LSS/LSS-XL Gen1/TAC21/HS3, Black, 103825-BLK , MPN: 103825-BLK , UPC: 709951107355 , Code: 3JN-WPM-BARRSA-103825-BLK
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Last updated 2026-07-10 UTC.