Description
One suppressor, two personalities. That's the whole idea behind the Gemtech Lunar 9. Run it at the full 7 inch length when sound reduction is the priority, or spin off the extension section and drop it to 4.7 inches when you want something shorter and lighter on the muzzle. Either way it stays hearing safe, metering around 129 dB in the long configuration and 135 dB in the short setup on a 9mm host. At 10 ounces long and just 7 ounces short, it won't turn your pistol into a nose-heavy chore to shoot.
How the Lunar 9 Is Built
Gemtech kept weight down without cutting corners. The tube and extension are machined from 7075 aluminum with a Type III hard-coat anodized finish, and the part that takes the most abuse, the blast baffle, is 17-4 stainless steel. That combination earns the Lunar 9 a full-auto rating in 9mm, so a long range day on a PCC or a suppressed subgun won't faze it. The baffle geometry is designed for plenty of internal volume and turbulence to strip gas velocity, and the internals index consistently so takedown and cleaning don't turn into a puzzle. This is a can you can fully disassemble and scrub, which matters with dirty pistol ammo.
More Than a 9mm Can
While 9mm is its bread and butter, the Lunar 9 is also rated for subsonic 300 Blackout, which makes it a natural fit on a quiet AR setup in addition to your threaded pistols. It ships with a 1/2×28 LID pistol assembly, the booster system that keeps tilting-barrel handguns cycling reliably with a can hanging off the muzzle. It's also compatible with Gemtech's full GM-9 mounting lineup, so fixed mounts for carbines and other thread pitches are easy to add down the road.
Where the Lunar 9 Earns Its Keep
If you want one 9mm suppressor that can jump between a nightstand pistol, a range carbine, and a subsonic Blackout build, this is a smart way to cover all of it with a single purchase. Versatile, lightweight, and simple to maintain, the Lunar 9 checks the boxes that matter most in a pistol can.
Key Specifications
- Model: Lunar 9
- Manufacturer Part Number: 12711
- UPC: 609224346637
- Caliber Rating: 9mm Luger, subsonic .300 AAC Blackout
- Length: 7 in long configuration / 4.7 in short configuration
- Weight: 10 oz long / 7 oz short
- Diameter: 1.4 in
- Tube Material: 7075 aluminum, Type III hard-coat anodized
- Blast Baffle: 17-4 stainless steel
- Thread Pattern: 1/2×28 (included LID piston)
- Mount Compatibility: All Gemtech GM-9 mounting options
- Sound Reduction: Approx. 129 dB long / 135 dB short (9mm)
- Full-Auto Rated: Yes, in 9mm
- User Serviceable: Yes, full disassembly for cleaning
- Finish: Matte black
What’s Included
- Gemtech Lunar 9 suppressor (7in and 4.7in configurations)
- 1/2×28 LID pistol assembly
- Operator's manual
Frequently Asked Questions
How quiet is the Gemtech Lunar 9 in each configuration?
Gemtech's metering on a Gen 4 Glock 17 came in around 129 dB in the full 7 inch configuration and about 135 dB in the short 4.7 inch setup. Both numbers are hearing safe, so you can pick the length that fits the job without giving up ear protection. Subsonic ammo will get you the quietest results either way.
Can I use the Lunar 9 on a 300 Blackout rifle?
Yes, it's rated for subsonic 300 Blackout in addition to 9mm, which makes it a solid dual-purpose can for a quiet Blackout build. Keep in mind it is not rated for supersonic 300 BLK loads, so stick to subs on that platform. You'll also want an appropriate fixed mount from the GM-9 line for rifle use rather than the pistol booster.
Does the Lunar 9 need a booster for pistols, and does one come with it?
Most tilting-barrel semi-auto pistols need a booster to cycle reliably with a suppressor attached, and the Lunar 9 ships with a 1/2×28 LID pistol assembly in the box. That covers the majority of threaded 9mm handguns right out of the gate. For fixed-barrel hosts and carbines, Gemtech's GM-9 mounting options let you swap to a fixed mount.
Is the Gemtech Lunar 9 user serviceable?
It is. The internal design keeps the baffles aligned consistently, so the can comes apart for cleaning and goes back together without headaches. That's a big plus for a 9mm suppressor since pistol ammo runs dirty and lead and carbon build up faster than they do in rifle cans.





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