Rugged Suppressors Obsidian9 3-Lug Adapter | 5/8×24 | OA006

The Rugged Suppressors Obsidian9 3-Lug Adapter (OA006) is a threaded mounting adapter designed for 9mm Luger, produced to HK spec for use with compatible 3-lug mounts. It provides a repeatable interface between a host firearm and a 3-lug suppressor or device and includes a patented Go/No Go gauge to confirm proper attachment. This adapter is intended for use on HK-pattern 9mm firearms and is explicitly not compatible with .45 ACP platforms.

Common applications include range and training use with 9mm HK-pattern pistols and installation on pistol-caliber carbines that accept HK-style 3-lug interfaces.

Product Specifications

• The model is 3 Lug Adapter.
• The manufacturer is Rugged Suppressors.
• The manufacturer part number is OA006.
• The thread pattern is 5/8″-24 tpi.
• The listed caliber/gauge is 9mm.
• The intended fit is HK (HK-spec 3-lug interfaces).
• The finish/color is Black.
• The listed weight is 0.129.
• The product dimensions are 1.55 x 1.45 x 2.55 (dimension values as provided).
• The product type is listed as Adaptor.
• This adapter includes a Go/No Go gauge to verify proper suppressor engagement.
• The item is specified as not compatible with .45 ACP.
• The UPC is 859383006730.

Engineered for a precise, repeatable connection, the Obsidian9 3-Lug Adapter is a practical upgrade for shooters using HK-pattern 9mm platforms who require a secure suppressor interface. Its Go/No Go gauge helps reduce guesswork during installation, and the adapter’s form factor preserves the intended alignment and function of compatible mounts.

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