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The HUB standard made rifle suppressor mounting simple, but pistol hardware never really got the memo. Most booster assemblies and 3-lug mounts still run smaller legacy thread patterns, which leaves a lot of great pistol mounts sitting in drawers. This JK Armament adapter bridges that gap. It threads into any suppressor with a standard 1.375×24 HUB mount, including the JK 155 series, and gives you female 1.125-28 TPI threads on the other side. That thread pattern, often called the Alpha pattern, is what SilencerCo uses across the Octane and Omega pistol lineup, so a huge chunk of proven mounting hardware suddenly works with your can.
The compatibility list is a good one. The SilencerCo Octane 3-Lug mount and Alpha ASR mount both thread right in, along with the Griffin Plan A mount, the Griffin A2 Optimus blast shield, the Rugged Obsidian 3-lug mount, and the Area 419 Hellfire mount in the Harvest option. That means one adapter can take your HUB can from a bolt gun to a 3-lug equipped PCC or subgun without buying into a whole new mounting ecosystem. If you already own SilencerCo or Griffin pistol mounts from a previous suppressor, this little ring puts them back to work.
JK machines these adapters from 7075 billet aluminum with a Type III hardcoat anodized finish, so it adds barely any weight to the front of your setup while shrugging off carbon and wear. At 1.55 inches in diameter it tucks neatly into the rear of the can, and the threads are cut clean so mounts seat square and stay put. JK Armament makes everything in the USA and backs their products for life, which says a lot about how much confidence they have in their machining. It is a simple part that solves a real problem, and it does it well.
Yes. The external threads are the industry standard 1.375×24 HUB pattern, so it fits any HUB-compatible suppressor, not just JK cans. Just make sure your suppressor has enough internal clearance for whatever mount you plan to run behind it.
This version accepts the SilencerCo Octane 3-Lug mount (AC2447/AC2448), SilencerCo Alpha ASR mount (AC2632), Griffin Plan A mount, Griffin A2 Optimus blast shield, Rugged Obsidian 3-lug mount, and the Area 419 Hellfire mount in the Harvest option. It is the same thread pattern SilencerCo uses on the Octane and Omega K pistol cans, so a lot of common hardware fits.
That depends on the mount and your suppressor's internals. The adapter provides the threads, but a booster assembly still needs room inside the can to cycle. If your suppressor lacks the internal depth for a full booster housing, a 3-lug mount on a fixed-barrel host like a PCC is the more straightforward route. JK also makes a dedicated HUB piston mount if pistol duty is the main goal.
No, Dead Air boosters and 3-lug mounts use the 1.203×28 thread pattern, so you would want JK's 1.203-28 version of this adapter instead. This 1.125-28 model is built for the SilencerCo Alpha thread family. Double check your mount's thread spec before ordering and you will be set.
| UPC | 850017729094 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | JK155LTA25 |
| Model | |
| Thread Pattern | 1.125-28 TPI |
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