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LANTAC built the Dragon reputation on muzzle devices that keep the gun pointed where you want it, and the 9mm Plan B Long carries that same DNA. It threads onto any 1/2×28 barrel and puts a full-length Dragon brake up front for your pistol-caliber carbine, AR-9, or 9mm pistol build. The whole point is flatter shooting, and this one delivers by redirecting gas to fight the climb you feel on rapid strings.
The heart of it is LANTAC's patented Short Energy Pulse system. Instead of letting recoil stretch out and overlap from shot to shot, the SEP design shortens that recoil impulse so the energy from one round doesn't stack onto the next and shove your muzzle off target. On a 9mm platform where cycling is quick, that translates to a sight picture that settles fast and stays put, which is exactly what you want running drills or shooting a match.
These brakes are machined on Swiss lathes from AISI 4140 steel, hardened to roughly 55 Rockwell C, then QPQ nitrided to AMS2753D standards. That process gives you serious corrosion resistance and a long service life under repeated firing, plus the clean matte black look LANTAC is known for. At 6.85 inches of overall length in the full-size configuration, it's a substantial piece of hardware meant for real use, not just show.
What sets this version apart is the Plan B hub mount. The Plan B interface uses a tapered seat and fine threads rather than spring-loaded locking parts, so it holds tight through precise tolerances. That means you can pair this brake with a Plan B compatible suppressor or a 1.375×24 HUB adapter later on without swapping muzzle devices. It ships with a timing shim set so you can index the brake correctly during install. Worth noting: LANTAC's Plan B mount is not licensed from Q, so check how that affects your specific suppressor's warranty before running a can.
It uses a 1/2×28 thread pitch, which is the standard for the vast majority of 9mm barrels on pistol-caliber carbines, AR-9 builds, and threaded handguns. As long as your muzzle is cut for 1/2×28, this brake threads right on. Always confirm your barrel's thread pitch before ordering.
Yes, that's the whole idea behind the Plan B hub. You can mount a Plan B compatible suppressor directly or use a 1.375×24 HUB adapter to run cans built on the common HUB standard. Keep in mind LANTAC's Plan B mount is not licensed from Q, so verify how that impacts your suppressor's warranty first.
The SEP design shortens the length of the recoil impulse so energy from one shot doesn't overlap with the next and push your muzzle off target. On a fast-cycling 9mm, that keeps the gun flatter and your sights back on target quicker between rounds. It's a big part of why LANTAC's Dragon brakes have the reputation they do.
It holds up well. The brake is hardened 4140 steel with a QPQ nitride finish done to AMS2753D standards, which builds in strong corrosion resistance and a long service life. That combination is made for repeated firing without the finish wearing out early.
| UPC | 614347635650 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DGN9MMB-PBL |
| Length | 6.8500 |
| Product Type | Muzzle Brake |
| Model | |
| Caliber/Gauge | 9mm |
| Color | Black |
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