
Availability: In Stock
The Yankee Hill Machine HD 3-Lug Adapter is a heavy-duty quick-attach mounting solution built for shooters running 3-lug-equipped suppressors and precision-demanding platforms. With a 1-3/8"-24 thread interface, this adapter is engineered to replace standard hub-compatible 3-lug mounts and deliver the durability needed for everything from precision rifle work to full-auto fire. Whether you're running subsonic loads through an AR-9, a 300 Blackout rifle, or a PCC, the HD 3-Lug Adapter provides the strength and reliability that sets Yankee Hill Machine apart.
Built from 17-4 stainless steel in a fully enclosed design, this adapter combines material science with purposeful engineering. The 17-4 alloy is known for its corrosion resistance and ability to handle sustained use and environmental exposure—critical traits for a mount that may live on your rifle through seasons of hunting, training, or tactical work. The black oxide finish complements the stainless construction while adding a layer of wear and corrosion protection.
The HD 3-Lug Adapter uses the HK tri-lug interface, making it compatible with a wide ecosystem of suppressors and quick-attach systems. If you already own a Yankee Hill R9 Sound Suppressor or another HUB-compatible 3-lug can, this adapter gives you the option to swap mounting solutions without replacing your entire suppressor lineup. For full-auto rifles and high-round-count training sessions, the reinforced construction means you're not compromising reliability for the sake of modularity.
This is the kind of upgrade that pays dividends on a dedicated host—especially if you demand longevity and zero wobble in your quick-attach system. Stainless steel construction, purpose-built geometry, and direct HK interface compatibility make this adapter a straightforward choice for serious 3-lug shooters.
| Thread Pattern | 1-3/8"-24 |
| Primary Material | 17-4 Stainless Steel |
| Mounting Interface | HK Tri-Lug (Hub Compatible) |
| Finish | Black Oxide |
| Design Type | Fully Enclosed Quick-Attach |
| Rated Use | Full-Auto Compatible |
Yes, if your suppressor features an HK tri-lug or hub-compatible 3-lug interface, the HD 3-Lug Adapter will work. This includes the Yankee Hill R9 Sound Suppressor and other HUB-compatible cans. The 1-3/8"-24 thread pattern is the standard for 3-lug mounting systems.
The adapter itself is caliber-agnostic—compatibility depends on your suppressor and host firearm. It works with 9mm, 300 Blackout subsonic, and PCC (pistol-caliber carbine) platforms. Always verify your specific suppressor's rated calibers and your host rifle's compatibility.
Yes, the HD 3-Lug Adapter is rated and designed for full-auto use. The 17-4 stainless steel construction and fully enclosed assembly provide the durability required for sustained full-auto fire and heavy use.
The HD 3-Lug Adapter uses 17-4 stainless steel with a fully enclosed design, offering superior material strength and corrosion resistance versus standard mounts. This construction is intended to provide added longevity and stability, especially under repeated quick-attach cycles or demanding use.



SKU: 115754352 • Width: 5.1in • Height: 1.9in • Depth: 7.9in • Weight: 0.44oz





Availability: In Stock
The Yankee Hill Machine HD 3-Lug Adapter is a heavy-duty quick-attach mounting solution built for shooters running 3-lug-equipped suppressors and precision-demanding platforms. With a 1-3/8"-24 thread interface, this adapter is engineered to replace standard hub-compatible 3-lug mounts and deliver the durability needed for everything from precision rifle work to full-auto fire. Whether you're running subsonic loads through an AR-9, a 300 Blackout rifle, or a PCC, the HD 3-Lug Adapter provides the strength and reliability that sets Yankee Hill Machine apart.
Built from 17-4 stainless steel in a fully enclosed design, this adapter combines material science with purposeful engineering. The 17-4 alloy is known for its corrosion resistance and ability to handle sustained use and environmental exposure—critical traits for a mount that may live on your rifle through seasons of hunting, training, or tactical work. The black oxide finish complements the stainless construction while adding a layer of wear and corrosion protection.
The HD 3-Lug Adapter uses the HK tri-lug interface, making it compatible with a wide ecosystem of suppressors and quick-attach systems. If you already own a Yankee Hill R9 Sound Suppressor or another HUB-compatible 3-lug can, this adapter gives you the option to swap mounting solutions without replacing your entire suppressor lineup. For full-auto rifles and high-round-count training sessions, the reinforced construction means you're not compromising reliability for the sake of modularity.
This is the kind of upgrade that pays dividends on a dedicated host—especially if you demand longevity and zero wobble in your quick-attach system. Stainless steel construction, purpose-built geometry, and direct HK interface compatibility make this adapter a straightforward choice for serious 3-lug shooters.
| Thread Pattern | 1-3/8"-24 |
| Primary Material | 17-4 Stainless Steel |
| Mounting Interface | HK Tri-Lug (Hub Compatible) |
| Finish | Black Oxide |
| Design Type | Fully Enclosed Quick-Attach |
| Rated Use | Full-Auto Compatible |
Yes, if your suppressor features an HK tri-lug or hub-compatible 3-lug interface, the HD 3-Lug Adapter will work. This includes the Yankee Hill R9 Sound Suppressor and other HUB-compatible cans. The 1-3/8"-24 thread pattern is the standard for 3-lug mounting systems.
The adapter itself is caliber-agnostic—compatibility depends on your suppressor and host firearm. It works with 9mm, 300 Blackout subsonic, and PCC (pistol-caliber carbine) platforms. Always verify your specific suppressor's rated calibers and your host rifle's compatibility.
Yes, the HD 3-Lug Adapter is rated and designed for full-auto use. The 17-4 stainless steel construction and fully enclosed assembly provide the durability required for sustained full-auto fire and heavy use.
The HD 3-Lug Adapter uses 17-4 stainless steel with a fully enclosed design, offering superior material strength and corrosion resistance versus standard mounts. This construction is intended to provide added longevity and stability, especially under repeated quick-attach cycles or demanding use.
SKU: 115754352 • Width: 5.1in • Height: 1.9in • Depth: 7.9in • Weight: 0.44oz


