Comstock Armory Recessed Micro Brake 1/2×28 9mm
Original price was: $69.00.$66.00Current price is: $66.00.
A rotationally symmetric micro brake built for 9mm barrels that pairs with Plan-B-style suppressor mounts — no shim timing required. Machined from 17-4 PH stainless steel with a black nitride finish, it doubles as a sacrificial baffle to extend suppressor life.
Out of stock
Description
Comstock Armory Recessed Micro Brake 1/2×28 9mm
The Comstock Recessed Micro Brake gives 9mm and pistol-caliber shooters a quick-detach mount that doesn’t chew up baffles the way most aftermarket brakes do. Since it’s rotationally symmetric, there’s no timing with shims to fuss over during install — thread it on, torque it down, and it’s ready to run.
Machined from 17-4 PH stainless steel and finished in black nitride, the brake is built to handle sustained heat without losing its edge, which matters given how often a Plan-B-style mount gets cycled on and off between range trips. Because it protrudes only minimally into the suppressor bore, fitment stays tight even on recessed-style adapters — a detail that trips up cheaper brakes designed without that clearance in mind.
Key Features — Comstock Recessed Micro Brake
- 17-4 PH stainless steel construction with a black nitride finish
- Compatible with common .900″-24 adapters: Comstock LPA, Q Plan-B, and Rearden Atlas
- Rotationally symmetric design — no timing shims required
- Standard 1/2-28 threads, fits barrels up to 0.750″ in diameter
- 13/16″ wrench flats for fast installation and removal
- 1.25″ overall length, adding just 0.42″ to the muzzle
- 1.4 ounces
- Rated for 9mm and .357-class bullets
Why This Product Stands Out
Most micro brakes on the market need to be indexed and shimmed to sit flush, which turns a five-minute install into a fitting exercise. This one skips that step entirely, since its symmetric design lands in the same orientation every time. That alone makes it worth a look for anyone who swaps suppressors between guns.
The recessed geometry is the other half of the story. Rather than intruding deep into the suppressor’s blast chamber, the brake acts as a sacrificial baffle positioned to take the brunt of wear that would otherwise land on the can itself — a distinction that matters once a suppressor sees a few thousand rounds. Even so, it’s worth remembering that some suppressor manufacturers won’t warranty their product when it’s run on an aftermarket mount, so it’s worth checking that policy before pairing the two.
Ideal Use Cases
- Quick-detach suppressor mounting on 1/2-28 threaded pistol-caliber carbines
- Extending suppressor service life by absorbing baffle wear ahead of a Plan-B-style adapter
- Recoil reduction on 9mm PCC builds running suppressor-ready barrels
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Comstock Armory |
| Model | Recessed Micro Brake – Plan-B Suppressor Mount |
| Thread Pitch | 1/2-28 |
| Bore / Caliber Rating | 9mm, up to .357 |
| Material | 17-4 PH stainless steel |
| Finish | Black nitride |
| Wrench Flats | 13/16″ |
| Max Barrel Diameter | 0.750″ |
| Overall Length | 1.25″ (adds 0.42″ to muzzle) |
| Weight | 1.4 oz |
| Timing | Rotationally symmetric, no shims required |
| SKU | MBM-12-9-R |
| UPC | 850069580391 |
Compatibility Information
Suppressor Mount Adapter Compatibility: Built for .900″-24 adapters, specifically the Comstock LPA, Q Plan-B, and Rearden Atlas systems.
Taper Shoulder Barrel Compatibility: Works with the Sig Taper Cap for taper-shoulder barrels, although some third-party taper-shoulder adapters with a larger outer diameter may not clear.
Host Barrel Compatibility: Fits standard 1/2-28 threaded barrels up to 0.750″ in diameter.
Manufacturer: Comstock Armory | Model: Recessed Micro Brake – Plan-B Suppressor Mount | Type: Suppressor Mount / Muzzle Brake | Caliber: 9mm (rated to .357) | UPC: 850069580391 | SKU: MBM-12-9-R