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The Gemtech GM-9/MM9 3-Lug MP5 Female QD Mount is the piece that bridges your Gemtech can and a 3-lug barrel. It threads into the rear of GM-9, MULTIMOUNT, and older TRINITY suppressors and gives you a proper MP5-style quick-disconnect interface. Instead of carefully spinning the suppressor onto muzzle threads, you push, twist, and you are locked in. That is the whole appeal of the 3-lug system, and it is exactly why HK built it into the MP5 platform in the first place.
This is a female adapter, meaning it accepts the three lugs on the barrel. It fits factory HK MP5 3-lug barrels right out of the gate, and it also works on other barrels that have been fitted with Gemtech's male 3-lug adapters. That flexibility is handy if you are running more than one host and want a single can to cover them. The mount is machined from steel and finished in matte black, so it holds up to repeated on-and-off cycles and heat without looking beat up.
Beyond the speed factor, a 3-lug lockup helps prevent walk-off, which is when a direct-thread suppressor slowly unthreads under recoil and risks a baffle or end cap strike. The lug interface indexes the same way every time, giving you repeatable alignment session after session. For a pistol-caliber carbine or subgun that sees a lot of rapid attach-and-detach, that repeatability and security is worth a lot. Keep in mind 3-lug mounting is meant for fixed-barrel guns like PCCs and subguns rather than tilt-barrel handguns.
If you already own a GM-9 or MULTIMOUNT 9, this is the correct rear adapter to run it on an MP5. It preserves the mounting integrity of the suppressor while opening up 3-lug hosts, so you are not stuck buying a whole new dedicated can. Match the mount to a compatible Gemtech 9mm suppressor and a proper HK-spec 3-lug barrel and you have a clean, quick-swapping setup.
It screws into the rear of Gemtech GM-9, MULTIMOUNT, and older TRINITY suppressors. If you already own one of those cans, this is the correct female adapter to run it on a 3-lug barrel. It is not designed for non-Gemtech suppressors.
Yes, it is built for factory HK-spec 3-lug MP5 barrels and locks directly onto the three lugs. It also works on other barrels that have been fitted with Gemtech's male 3-lug adapters. Confirm your barrel uses a standard HK 3-lug pattern before ordering.
A 3-lug lets you push, twist, and lock the suppressor on in seconds rather than threading it carefully every time. It also indexes consistently and helps guard against walk-off, where a direct-thread can loosens under recoil. That makes it a favorite for subguns and PCCs that get a lot of rapid attach-and-detach use.
No. The 3-lug system is intended for fixed-barrel firearms like pistol-caliber carbines and subguns such as the MP5. Tilt-barrel handguns need a piston-style mount instead.
| UPC | 609728888978 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 12180 |
| Color | Black |
| Length | 5.7 |
| Package Height | 1.6 |
| Package Width | 3.9 |
| Product Type | Accessory-Silencer Accessories |
| Shipping Weight | 0.205 |
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