The JK Armament 155 Booster/3-Lug Adapter in 1.180×24 is a lightweight adapter ring made to accept Gemtech-pattern boosters and 3-lug mounts. JK Armament machines it from 7075 billet aluminum and finishes it in Type III hard anodize, which keeps the weight to half an ounce. It adapts the 1.375×24 HUB thread used on JK 155 suppressors to the internal thread of your mount. Choose this 1.180×24 version when your mount is Gemtech pattern, since the other JK adapter sizes will not thread onto it.

Key Specifications

• The internal thread is 1.180×24, the size JK lists for Gemtech, Liberty and SD Tactical Arms 3-lug mounts and boosters.
• The tube-side interface is the 1.375×24 HUB thread, so it fits JK 155 suppressors and other HUB-mount cans.
• The material is T6-7075 billet aluminum, a strong alloy that keeps the part light.
• The finish is Type 3 hard anodize in black, a hard coating that resists wear.
• It weighs 0.5 ounce and has a 1.55-inch diameter, so it adds almost nothing to the suppressor.

Frequently Asked Questions

Which mounting systems does this adapter accept? It is the 1.180×24 size, which JK lists for the Liberty, Gemtech and SD Tactical Arms 3 Lug Mounts, the Liberty, Gemtech LID and SD Tactical Arms boosters, and MMW Reflex OTB mounts.

Can I use it with a different thread size mount? No. The thread has to match, and JK makes separate adapters in 1.125×28 and 1.203×28.

Buy the JK Armament 155 Booster/3-Lug Adapter, 1.180×24 Gemtech

A booster or 3-lug mount only works if the thread on the adapter matches, and this one is cut for the 1.180×24 Gemtech pattern. It is light, hard anodized and made in the USA by JK Armament. Order it with other suppressor parts and accessories from our Lubbock, Texas gun shop for fast direct shipping.