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I don’t think that brake will work, despite being in the correct 3/4x24 thread pitch. If it is shaped internally like the 5/8x24 version, there is no material for the barrel muzzle to index off. Essentially the brake is drilled straight through and threaded all the way to the actual brake chamber, so internal shims wouldn’t be able to push against anything for indexing.Thunder Beast Arms CB Muzzle Brake, .30, 3/4x24
The Thunder Beast Arms CB Muzzle Brake, .30, 3/4x24 is a mount for all TBAC Compact Brake ("CB") series suppressors.
This question just sent me down a rabbit hole, as I'm going to put an Ultra 7 on mine. It sounds like a shim kit similar to the one for the M110 FH is the recommended solution, based on the small amount of shoulder remaining when using 3/4x24 threads on these barrels.
I’ll have to watch my language, since this is a public market.
Their gas block arrangement is the best evolution of the system. I don’t have any mod 2 barrels presently, but I seem to recall dimensional differences or something with the threads that made it not compatible with throwing a conventional block on there. I need to measure again to refresh my memory. Nonetheless, the best course of action was to re-do my own barrel with the 5/8 threads.
There wasn’t any tuning. The mod 2 barrels simply aren’t compatible, as they aren’t a standard gas system length, nor is their gas port the same distance off the shoulder. While you can dimple it where it lands and let the block float out there, it loses half its support - and sealing area - because of the mod 2 gas block threads. Now for the ECC and older models, they’re still a standard rifle gas length and you can put a block on them if you desire. It just defeats the whole purpose of having that high-dollar rifle system if you’re going back to square one and tuning it with peasant-level parts. As well as kills the value. That’s why I say do your own barrel. For continuing the tuning of a factory 25, the system needs to be left as it is: bolt group, buffer spring, etc. I made some tweaks in there for mine, but the overall system design and it’s weights are the same.
I did not. I don’t believe in messing with the stuff in the rear in place of the front when dealing with 7.62 platforms. They are very different than 5.56. Until I have a couple hundred thousand rounds to test - and validate - tinkering with new springs and such, I’m sticking with Knight’s components and as much of their system as I can. Because they’ve already done it. Unsuppressed, the modern sr25 is the most evolved and perfected duty-grade 7.62 platform out there. That’s why certain suppressors - which also happen to then be chosen for the same duty roles - are tuned for those platforms. Example: Surefire. Problem is they are heavy, and built for platforms that are in general made for both a suppressed and unsuppressed function. That unsuppressed function and need was where it was because of the weight and length of those suppressors. Here comes Thunderbeast making heavy duty suppressors at half the weight. They’re tested and proven. I can tell you from personal experience, that the only reason I ever wanted to not be suppressed was because the juice wasn’t worth the squeeze for that particular mission to have to swing around that pound and half hanging off the end of my rifle. That changed with Thunderbeast. Length is not much of an issue as it is the weight. So now that allows me to have a suppressed rifle that feels and swings like it’s still unsuppressed. That’s my new system. Only problem is those Suppressors at the time (Ultra) overpressure the rifle. So in order to restore the system - which is primarily the validated sr25, I just want to bring those gas levels/volumes back in line to what that rifle was designed for. In my opinion, that is best mitigated as close to the source as possible. And until I can fab up a gas tube with a port that I can put a pressure gauge on to to get my readings, then I’ll stick with dialing in a block. Once I get it set, that’s where it stays. Freeze up if it wants to, I don’t care. It’s done the same thing for me that I’d get if I took my drill press to the range with a reamer set and played with port diameters in between firing a whole lot of rounds. I don’t recommend anyone expending ammunition like that with our present circumstances.
Not sure with a Dominus yet, but with the Ultra 7 I was running on 5.56, pressure was significant. I’m used to Surefires and not having to turn any switches or adjust anything when it’s on or off. The Thunderbeast, while on a 100% suppressed setup, made me realize it’s too much for what we are all used to for gas length to barrel length ratios. 16” midlength was too much. I’m confident I could put a rifle gas on it and get much better results. I have a new 18” with rifle gas still a couple months out, and it’s going to be built around the Thunderbeasts.
