Rugged Suppressors RU3 3-Lug Mount — Universal HUB 1/2×28

Description

Rugged Suppressors RU3 — Taper-Lock 3-Lug Mount for HK-Spec 9mm

The Rugged Suppressors RU3 is a universal 3-lug mount built for 9mm subguns and pistol-caliber carbines. Because of its taper-lock design, this mount grips the suppressor concentrically with zero wobble. As a result, you get a rock-solid attachment that stays tight through extended shooting sessions and full-auto fire.

Furthermore, the RU3 accepts any HUB-threaded suppressor—including Rugged’s own Sub9. Therefore, you can swap suppressors without changing mounts. In addition, HK-spec 3-lug compatibility means this mount fits virtually every 9mm subgun platform. On top of that, the 1/2×28 thread pitch works with legacy 9mm firearms as well as modern PCC platforms.

Rugged Suppressors RU3 — Black Nitride Durability and Repeatable Mounting

The RU3 features a black nitride finish rated for hard-use environments. Because of this tough surface, the mount resists corrosion and wear even with frequent suppressor swaps. In other words, nitride-coated steel holds its finish through repetitive assembly and disassembly.

As a result, you avoid the cosmetic damage and surface galling common to unfinished mounts. Moreover, taper-lock geometry eliminates the spring tension creep found in traditional 3-lug designs. Consequently, point of impact stays repeatable across mag dumps and suppressor changes. For example, an operator can swap to a fresh suppressor mid-range and stay on target—something spring-lug mounts struggle to guarantee.

Rugged Suppressors RU3 — Versatile Platform Compatibility

The Rugged Suppressors RU3 fits any HK-spec 3-lug adapter, making it universal across platforms. Specifically, it works on B&T APC9, MP5 clones, PWS MK111 PRO systems, and all standard 9mm subguns. Additionally, many 9mm PCCs ship with HK-spec lugs, so the RU3 mates directly without additional hardware.

Because of this broad compatibility, you build a single suppressor setup that moves between rifles. Furthermore, pairing the RU3 with a Rugged Sub9 creates a balanced 9mm suppressor package optimized for short barrels and close-quarters shooting. In short, one mount unlocks multiple platforms.

Rugged Suppressors RU3 Specs and Details

Rugged Suppressors RU3 — Additional Information

• What you get: One RU3 3-lug mount ready to mount any HUB-compatible suppressor. Specifically, installation requires only hand-tightening onto a compatible 1/2×28 barrel or brake.
• Installation: Because of the straightforward design, screw the RU3 onto your 1/2×28 threaded barrel until snug. Consequently, no tools, headspace gauges, or gunsmithing are required. As a result, swap suppressors in seconds.
• HUB compatibility: The RU3 accepts any suppressor with 1.375×24 HUB threads—the new industry standard for universal 9mm mounts. Furthermore, HUB adapters allow multiple configurations on one suppressor, so you can run the same can on 3-lug rifles, pistol braces, and other platforms.
• Taper-lock advantage: Unlike spring-based 3-lug designs, the RU3 locks via a tapered surface that grips the suppressor cone without relying on tension. Therefore, mounting pressure stays consistent even after repeated installation and removal cycles. In addition, taper-lock eliminates POI shift caused by spring relaxation.
• No FFL required: This mount is a non-NFA muzzle device—only the suppressor itself requires an ATF Form 4. Consequently, the RU3 ships directly to your door. However, the attached suppressor must go through an FFL and NFA paperwork.