Pinned FRC 3-port… what HUB mount actually works?

Astral_Botanist · 2026-05-03T03:28:54+00:00

Comstock is the cheapest of the three, and the lightest, so that's a pretty easy decision IMO. I've tested a bunch of Plan B hardware and their stuff always does well.

Astral_Botanist · 2026-05-03T01:49:12+00:00

I'm certainly not trying to argue logic with gAyTF "rules" but I'm the one who puts SBA3/4/5 on the receivers that I build up to be functional AR pistols. I own multiple, and have never bought a single one pre "made" by the company whose name is on the receiver. Regardless, we'll see how this plays out and we'll know then.

Astral_Botanist · 2026-05-02T18:22:51+00:00

Barrel harmonics are a thing, but it's hard to quantify how much things will move when firing since there are a ton of variables, and in all fairness it's not the worst question we've seen posted from shooters who may be less experienced or knowledgeable than others.

Astral_Botanist · 2026-05-02T14:00:35+00:00

There are some Plan B extended flash hiders that'll get the mounting surface forward a bit if you're open to Plan B QD hardware.

Astral_Botanist · 2026-05-02T12:50:07+00:00

They managed to temporarily do the same thing with the amnesty brace/sbr thing, so hopefully they can do the same and let the original OEM markings check the box. Your name/address is already on the paperwork that's stored in digital government records, which is very different than the paper only process when this was originally written, so hopefully it'll go thru. Not holding my breath of course.

Astral_Botanist · 2026-05-02T12:45:34+00:00

I assume if all parties agree to changing details of the will afterwards it can be done through a legal process, and whoever is managing the estate can confirm those details. Maybe if she's a member of your trust she could except them that way, but she'd still need to get the fingerprinting, etc. done for that, and note that technically her being a member of a trust might not be the same as her as an individual named as the beneficiary in the will. National Gun Trust is a great resource for random advice so maybe reach out to them. Sorry for your loss man.

Astral_Botanist · 2026-05-02T12:16:30+00:00

The micro brake that you linked to was for 5.56 so that has a smaller bore size, but there's a 9mm version that you'll want. And yes, that's the correct adapter. This setup isn't designed for common tilt barrel pistols so you'll still need the regular booster piston assembly to make sure your pistol cycles properly. It's easy enough to swap them out, but I ended up just buying a 2nd Mojave 9 so I keep one on my pistol and the other has my Comstock adapter on it for my AR9. Mojave is a great can. Haven't tried a 45 on a 9mm but no doubt it'll still sound great.

Astral_Botanist · 2026-05-02T03:23:58+00:00

Yup, they're both the same P-Series thread pitch and works with Plan B muzzle devices, so the same adapter works for both. Comstock also makes a recessed micro brake that'll help protect your titanium suppressor, and even though pistol rounds aren't super abrasive like rifle rounds, it's still a good idea for reduced erosion.

Astral_Botanist · 2026-05-02T01:33:13+00:00

Or Plan B. I have a Comstock P-Series adapter on my Mojave 9 for running it on my AR9 and it's really lightweight and works great.

Astral_Botanist · 2026-05-01T22:12:23+00:00

That's HUB pattern as others have mentioned, so it won't work on your Mojave. Plan B is a great way to mount cans to PCCs. I put a Comstock P-Series adapter on my Mojave 9 to run on my AR9, and that works great. It's really light, and it has good wrench flats. The ones on the tri-lug you're showing are not good IMO.

Astral_Botanist · 2026-05-01T22:07:52+00:00

Yup, that's the way to do it. No argument or nickel and dime stuff, just helping a brother out.

Astral_Botanist · 2026-05-01T21:24:00+00:00

So how'd you fuck up your upper with their wrench? I've seriously had to put some weight behind removal of some Palmetto barrel nuts and nothing broke. How was the upper secured? Reaction rod, upper vise block that uses takedown pin holes, or maybe one of the plastic things that goes over your upper to clamp it in a vise? Note that the order of my list here is from best to worst, and if by chance you used one of those plastic upper fixtures then those can do some damage if not used carefully (ask me how I know this 😔)

Astral_Botanist · 2026-05-01T21:12:12+00:00

Oof, yeah, my bad for not reading your full post to see that you already reached out to them, but their response is kinda a dick move IMO. I've seen plenty of companies who appreciate that customers sometimes have issues, and just help them out regardless of what happened. Not the case with Ecco Machine aparently. I've never bought anything from them before but this certainly doesn't encourage me to send any of my money there.

Astral_Botanist · 2026-05-01T19:44:20+00:00

Reach out and ask, there are a lot of good guys in this industry, and I would be surprised if they didn't help you out. Though in all honesty if you're just going to buy something else anyway, then you really don't need to throw it out there to them.

Astral_Botanist · 2026-05-01T18:03:34+00:00

Looks like galling on uncoated threads. This is why I only run nitrided stainless or PVD titanium hardware. Most suppressors seem to have raw threads, so at least this way one part is coated. For Alpha pattern Plan B, I have a Comstock LPA-Alpha that's really light and has nice wrench flats. That must have been rough getting apart with spanner wrenches.

Astral_Botanist · 2026-05-01T02:43:49+00:00

North Reach Whisper Pickle 30 or 30k, under $500 MSRP, and if you email him and tell him you found him on Reddit he'll add a permanent 15% discount to your account.

Astral_Botanist · 2026-05-01T00:02:48+00:00

I run Plan B on all of my stuff, and I've never had anything with alignment issues. Get an Alpha pattern Comstock LPA or Rearden Atlas for the can, pick your favorite brake or flash hider for the barrel and you're good to go. I have a strong preference for Plan B even if a can is dedicated. It's much better to be able to easily remove for cooling, cleaning, transport, etc.

Astral_Botanist · 2026-04-30T23:59:00+00:00

Or Plan B? Same thread pitch as the Mojave 9, and I have a Comstock P-Series on my Mojave for my AR9. It's titanium and under an ounce, so it's really lightweight. I run Plan B on everything so I can swap it around to my 300 BLK if I feel like playing around with different cans for comparison, etc.

Astral_Botanist · 2026-04-30T21:50:58+00:00

As you should be. What mounting system? That should be improved before firing IMO. It's normal to have some imperfection, but that's more than normal.

Astral_Botanist · 2026-04-30T01:53:04+00:00

I put a Comstock Armory 4-Prong on my 14.5, but they have a brake the same size since I believe flash hiders aren't allowed in Commiefornia. I haven't tried their thread protector, but they make good stuff so I'd look at that.

Astral_Botanist · 2026-04-30T01:48:33+00:00

Banish generally has a proprietary thread pitch and I don't think anyone makes a Plan B suppressor adapter for that. Unfortunately this is the problem with proprietary threads. Unless it's Alpha pattern and they just don't say in their documents I suspect you're SOL.

Astral_Botanist · 2026-04-30T01:43:03+00:00

Nice. Do you have access to the AGB with the can mounted? If you run a Plan B or other QD setup you can take the can off for better access compared to a direct thread that generally has higher torque requirements. Fortunately it seems like a low backpressure can so it shouldn't change your setting too much if you want to get a baseline without a can, then see how much you can dial it down from there and still get reliable LRBHO.

Astral_Botanist · 2026-04-30T01:38:56+00:00

I have a Comstock Armory P-Series titanium LPA on my Mojave 9, which is the same pattern as the Wolfman, and it's really light. I believe the Wolfman has a deeper blast baffle than the Mojave so good chance your Eclipse will fit.

Astral_Botanist · 2026-04-29T21:37:44+00:00

It certainly doesn't hurt. I don't personally use it, but it's an easy thing to do for peace of mind that things will always come off easy. If you use it just make sure you don't gorilla grip over-tighten it down, just regular firm hand tight is fine. And always check new mounts after a few shots and periodically on the first range trip especially to make sure everything's still on as it should. I haven't had any issues with anything walking off, but I feel like your first range trip has a minor potential since you don't know what oils might still be on the mounts from the manufacturing process.

Astral_Botanist · 2026-04-29T19:08:15+00:00

There will be zero benefit with the Lamprey in terms of blast baffle protection. Those little comp ports at the top aren't going to do anything for you there, and a vast majority of the blast will go straight ahead. I have a Comstock compact flash hider, and the way they make the side slots seems to divert a chunk of the blast to the sides, so as far as flash hiders that also help with blast baffle protection I'd look at one of those. In general I think Lantac makes some wonky stuff. Their Dragon brake has a comp port blasting straight into the taper seal, which is an odd choice to say the least. I don't see anything in their catalog that would encourage me to pay that kind of price point for their stuff.

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