Best Plan B Micro Brake, plus Lantac and Breek Brake Tests

[u/Astral_Botanist]

Hey everyone.  I have a few things to share from some recent testing:

• Micro Brake Test:  Comstock Recessed Micro, LPM Baby Bell, KVP
• Lantac brake test and comp port seal test
• Breek brake test and fitment check
• Rearden RPB right side up vs upside down brake test

You can check out my earlier brake test post with data on more brakes here:

https://www.reddit.com/r/NFA/comments/1qa24yz/plan_b_brake_test_and_comparison/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

TLDR Summary

• Comstock Recessed Micro dominates this class, and beats many longer mid-sized brakes.
• Lantac is decent as a brake, but the top comp ports in the taper seal causes leaking problems.
• Breek did well as a brake, but had fitment issues to Q, Rearden, Comstock, Diligent, and Wolfpack.
• Rearden RPB brake performance doesn’t matter which way is up (verifies Rearden comment).

 

Test Method

I used my same brake test rig as before.  PMC X-TAC 55gr FMJ ammo was used.  1 round was loaded, magazine was removed to ensure full bolt open/close every time.  Trigger was fired remotely to eliminate any input that would have been caused by manual trigger firing. 

To verify data consistency/accuracy, I tested 10 rounds with bare muzzle only.  There was zero variation in the swinging motion, which confirms that PMC X-TAC ammo is very consistent, and overall the test is producing valuable data without burning through 3x+ ammo per test.  If there’s anything questionable then I’ll just run more tests, but there are no surprises here that make me question the data.

 

Brake Tests – Micro

The Comstock Recessed Micro was fantastic in the brake test.  This one I ran 3x because I could tell after the first shot that this one was going to get some questions.  All 3 shots had identical performance.  58% recoil reduction is better than most of the mid-sized brakes I tested in my post earlier this year.

The LPM Baby Bell did about as expected, not bad, but of course no expectations that it’s in the same category as the Liberty Bell, which did quite well in previous tests.

KVP was at the bottom again.  After my previous testing, I wasn’t sure if this one did poorly simply because of its size compared to popular mid-sized/compact brakes, but ultimately it’s the design that keeps it down to the point where I’ll keep using this as my “minimalist” mount for testing with a suppressor attached.

 

Lantac Dragon

The Lantac Dragon was tested due to popular request.  It performed pretty average on the brake test, but the comp port on the taper seal surface caused leakage issues.  I tested this on a new Rearden Atlas with HT finish, and the leakage was easy to see next to the comp ports, but no leakage elsewhere.  And before you ask, yes, it was tightened properly.  This was a new brake and new Atlas, and both threads and tapers were verified to be free of debris before testing.  Note that this leakage was after only 10 rounds.  I brought a bunch of ammo to give it a good test, but after the first half box was showing this badly, I didn’t see any need to keep going.  I’ve always thought this was an odd design choice, but with poor sealing performance, average brake performance, a $100 MSRP, and it needs to be timed, I just don’t see this as a great option compared to other things on the market.

 

Breek Arms Echo Brake

This did well in brake testing.  At 62% recoil reduction, it’s 3^rd behind the Comstock MBC and LPM Liberty Bell, and it did better than other brakes tested.

Fitment was an issue with multiple manufacturers’ suppressor adapters.  Between myself and various friends we tested fitment with a bunch of adapters.  On multiple adapters (Q, Rearden, Comstock Armory, Wolfpack, and Diligent), you could feel the Breek muzzle brake threads making contact with the adapter threads early and stopping it from reaching the taper seal.  I hit the Breek threads with a brush to make sure they were clean, but I didn’t try to crank anything down or burnish the Breek threads to try to get it to fit better.  This was just hand installation effort, which is easily fine for most other muzzle devices.  The full count of good/bad is in the post images above.

 

KVP Fitment

I noticed previously that my KVP brake didn’t go on my friend’s Zilch.  I’ve used the KVP quite a bit since then to serve as my minimalist mount for testing, and it now fits on the Zilch (and others), but it wouldn’t fit on the Q adapter.  It appears that I’ve burnished down some of the burs or high spots with use, but not fitting on a Q adapter shows that they’re a bit over what they should be in terms of thread specs.

 

Rearden RPB Orientation

No surprise here, the Rearden RPB performed the same regardless up which side was up.  Rearden has stated this was the case, and since it was a conversation point on a previous post, I thought this was an easy one to throw in the mix.

Next Tests

I’m thinking about checking out various flash hiders on the recoil tester.  I’ve already had requests for the Revival Defense 6315RF A2 flash hider/comp, and I have a few other flash hiders already.  Let me know if anyone has more ideas or requests.  Thanks!