YANKEE HILL MACHINE | HD 3-LUG ADAPTER 1.375×24 | 9MM
YHM HD 3-Lug Adapter — 17-4 stainless, HUB compatible, full-auto rated quick-attach system for 9mm. Available at Down Range Guns & Ammo in Maple Grove.
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Description
YANKEE HILL MACHINE HD 3-LUG ADAPTER — 9MM
Overview
The Yankee Hill Machine (YHM) Heavy Duty 3-Lug Adapter is a robust, quick-attach mounting solution built for hard-use 9mm firearms, including subguns, PCCs, and full-auto platforms. Fully enclosed and machined from 17-4 stainless steel, this adapter is engineered for strength, repeatable lockup, and longevity under high heat and high round counts. This YHM HD 3-Lug Adapter is available now at Down Range Guns & Ammo in Maple Grove.
Performance & Design
The adapter uses the iconic HK-pattern tri-lug interface, ensuring fast, secure attachment and removal without tools. Built to withstand full-auto fire, the HD adapter offers a superior upgrade over standard-duty 3-lug mounts. Its HUB-compatible design (1-3/8×24) means it can directly replace most universal suppressor mounts used across major brands.
Compatible suppressors include:
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YHM R9
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YHM Nitro N20
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And any HUB-threaded suppressor using 1-3/8×24 base
The combination of aluminum housing and 17-4 stainless components keeps weight manageable while maximizing strength where it counts.
Ergonomics & Controls
The fully enclosed assembly protects the locking mechanism from fouling and debris, improving reliability during rapid fire or suppressed shooting. Its matte black finish resists carbon buildup, scratches, and corrosion.
Compatibility
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Thread Pattern (HUB): Replaces any 1-3/8×24 suppressor mount
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Firearms: 3-lug-equipped 9mm hosts (MP5, APC9, Scorpion w/ 3-lug barrel, etc.)
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Suppressors: YHM R9, Nitro N20, and most HUB-based suppressors
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Suitable for select rifle calibers (per YHM guidelines)
Key Features
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Fully enclosed HD quick-attach 3-lug system
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17-4 Stainless Steel construction (core)
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Aluminum housing for weight reduction
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Matte black finish
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Designed for heavy use & full-auto compatibility
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HUB (1-3/8×24) compatible
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Weight: 4.20 oz
What’s Included
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YHM Heavy Duty 3-Lug Adapter (Black)
Specifications
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