Rugged 3-Lug Adapter 1/2x28 - Precision Machined, Durable Mounting Solution

The Rugged 3-Lug Adapter 1/2x28 is a precision-machined mounting interface designed for shooters running Rugged Suppressors' Obsidian9 3-Lug suppressor system. If you're building or converting a 9mm AR-15 to run a 3-lug suppressor mount, this adapter threads directly onto your barrel and serves as the foundation for quick-disconnect suppressor attachment. It's made to HK-spec 9mm standards, ensuring reliable engagement with Obsidian9 3-lug suppressors.

What sets this adapter apart is Rugged's built-in Go/No Go Gauge—a patented confirmation system that tells you at a glance whether your suppressor is fully and properly seated. That's the kind of feedback that matters when you're running suppressed: you know the can is locked in tight, no guesswork. The adapter itself is precision-machined from durable materials for long-term reliability in the field or at the range, and it's finished in black to match modern rifle builds.

Installation is straightforward: thread it onto your 1/2x28 barrel using red Loctite and torque to 20–25 ft-lbs for proper retention. Keep in mind this adapter is built for 9mm only and is not compatible with .45 ACP platforms, so verify your caliber before purchase.

Key Features

• Go/No Go Gauge confirmation for proper suppressor seating
• Precision-machined construction for reliable long-term performance
• Compatible with Rugged Suppressors Obsidian9 3-Lug Mount
• HK-spec 9mm design
• Black finish

Specifications

Frequently Asked Questions

Is this 3-lug adapter compatible with .45 ACP?

No. This adapter is manufactured to 9mm HK specification and is not compatible with .45 ACP platforms.

What suppressor does this adapter work with?

The Rugged 3-Lug Adapter is designed to work in conjunction with the Rugged Suppressors Obsidian9 3-Lug Mount.

What torque should I use when installing the adapter?

Rugged Suppressors recommends applying red Loctite and torquing the adapter to 20–25 ft-lbs for secure attachment to your barrel.

What is the Go/No Go Gauge?

The Go/No Go Gauge is a patented feature built into the adapter that provides visual confirmation your suppressor is properly seated and fully attached, eliminating doubt about suppressor engagement.