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MINI REVIEW: Huma Mod 40 Avalanche Moderator (Problem Solved?)

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Air King

Air King

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Jul 22, 2024
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SECOND EDIT: Taking the suggestion of Robert to wrap the inserts in felt (see below) has led to great improvements in the ballistics of the Sig, which now seems as good or perhaps even better than the Buck Rail, further testing is required. But gone are the wild cartwheels from before. I made a two can shorty with felt wrapped inserts, such a huge difference, more experiments are needed but I ran out of felt.

So this review is upgraded from "Problematic" to "Problem Solved?" Maybe so.

FIRST EDIT: After more experiments, I've found that in .177 with the first insert can and three empty cans, it groups pretty good, seems as Good as the Buck Rail. It also seems a bit quieter, although not as quiet as running it with all four inserts. With the .22 Sig Virtus it's worthless, which I'll comment on further in the thread.

So I've upgraded my review from "Garbage" to "Problematic".

Now as for my comments about Trenier, they're the seller, they did a quick efficient job of sending it and I also got some premium pellets at a great price. But the moderator itself is problematic, if I sold them I'd pressure these moderator companies for sales support, I'd not sell them without that.

INITIAL POST:

I was hoping this Huma 40 Avalanche in .25 would be a good moderator, I saw a lot of positive reviews around, reviews that were probably paid for. It's noticably quieter than my Buckrail. However, I can't hit the broad side of a barn from 25 yards using an otherwise fairly accurate .22 Sig Virtus, the pellets go every which way and I mean wildly, many veer off by 50 feet or more, not fooling. I've tried many things like shortening and switching around the cans and inserts. I even ran it empty. All gave dangerous results, I mean that, dangerously inaccurate.

I also tried it on a .177 Avenger and it's still very inaccurate, no way will it zero. And I've no such problems with the Buckrail.

So in conclusion, the Huma Mod 40 Avalanche Moderator is an expensive piece of junk suitable for shooting off your foot, or the foot of anyone in the area. If you've the side of a barn that you want to remain in pristine condition, get this moderator. Even a French airgun competition judge would have to agree, any French contestant using this moderator in competition will lose.

Lastly, I got it from Trenier in Wisconsin for $150, so I'd like to thank them for selling me this junk, I thought they were experienced with these moderators, but it seems they've no problem selling junk.
 
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I have a few of the previous Huma model MOD40's (not the Avalanche) and really like them. I have not tried the Avalanche model, but am pretty shocked they are that horrible. Have you tried contacting Huma Air to see if they will do anything for you. Have you contacted Jeff at Trenier Outdoors and talked to him? I doubt he'd sell a product if every one of them was giving folks those sort of problems.
 
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I have a mod 40 I recently got from Trenier. I haven’t had any of those issues. It’s the avalanche so not as quiet as the Kevlar inserts. That’s my only complaint personally. I just made a wrapped insert so I’ll see if that helps with noise.
Something is off that’s for sure. I don’t think I’ve heard of a moderator throwing off a pellet that bad in my life.
 
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There's no clipping, nor did I post my review so that we could have enough information, but rather to say to the entire world - don't buy this junk. That's all the information we need here.

I tried two different airguns using a few different pellets that are otherwise accurate both unmodded and with a Buckrail moderator. And so my conclusion comes by experience and some scientific methodology.

And why would I contact Huma? They're not even in the United States, I can't be bothered with all that. And I didn't trash Trenier, they've a clear "no return" policy on used items, so they're under no obligation to issue a refund, nor do I have any obligation to ask them as much.

Everything I've said here is factual, not trash, the Huma Mod 40 Avalanche is what's trash. And whether or not I could get a refund isn't my point, the point is that this moderator is dangerous, I mean that. Hazardous to people and property. This moderator should be recalled and taken off the market. Not joking.
 
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It attaches to the Sig at the barrel, it simply won't group, wildly goes every which way. On the Avenger it's via a DonnyFL adapter and groups maybe 5' (feet) at 35 yards and won't group beyond that, just scatters.

Compared with the Buckrail, the Sig groups 1-2" at 35 yards, the Avenger is like a dime or tighter, really spot on. But not as quiet.

My review is fair and honest, say what you will but I'll not compromise, the air gunning public has a right to know about my experience with this product.
 
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I've been working on it, tried many things including making inserts from foam pipe insulation that fits into the cylinders, but it simply doesn't work in .22 and in .177 there's no consistency.

I've tried to get it to run on the Avenger but it's not consistent, POI is affected and velocity, one shot will be near what it should (900 fps) but then it's 850, one shot will be accurate, the next off by many feet, that sort of thing.

Many here and elsewhere say otherwise, but I don't have enough information to know otherwise, I don't know their standard and definition of accuracy, I only know mine. And by my standards and definitions the Huma Avalanche doesn't work.

There's no apparent flaws, it appears to be made as it should, but the design simply doesn't work.
 
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When you have a gun that’s a blast cannon, meaning it’s not tuned for optimum efficiency, some mods have a big problem dealing with this. When a gun is wasting a ton of air, you’re asking a lot from a mod. I‘m not a fan of the Avalanche either. Their previous design was better. My guess is the Avalanche is cheaper/easier to produce and maintain.
 
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Vetmx said:
When you have a gun that’s a blast cannon, meaning it’s not tuned for optimum efficiency, some mods have a big problem dealing with this. When a gun is wasting a ton of air, you’re asking a lot from a mod. I‘m not a fan of the Avalanche either. Their previous design was better. My guess is the Avalanche is cheaper/easier to produce and maintain.
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I think the Sig is a blast cannon, an airsoft gun that shoots pellets, the loudest thing about it is the action, I think the belt runs part mechanical (the initial trigger pull is very heavy) and part blowback (the trigger lightens up in rapid fire).

As for the Avenger, it's at 1500 PSI with light hammer spring, so it's not what I'd call a blast cannon. I think the Avalanche is just a bad design, creates a lot of turbulence. I even aligned the insert spines evenly by peering in the holes, but no difference.

I found that in .177 it works okay with the first insert can and three empty, not as designed nor the value for which I paid, but it'll do for now.
 
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You can wrap the avalanche inserts with felt, etc. I tested mine today it definitely quiets them down. Not sure that’ll help with your issue(doubt it). I’ve never heard of a moderator throwing off pellets that bad and causing 50fps variations in speed. Something’s definitely way out of wack. Almost sounds like they are spiraling real bad. Bummer, Good luck

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Air King said:
It attaches to the Sig at the barrel, it simply won't group, wildly goes every which way. On the Avenger it's via a DonnyFL adapter and groups maybe 5' (feet) at 35 yards and won't group beyond that, just scatters.

Compared with the Buckrail, the Sig groups 1-2" at 35 yards, the Avenger is like a dime or tighter, really spot on. But not as quiet.

My review is fair and honest, say what you will but I'll not compromise, the air gunning public has a right to know about my experience with this product.
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I’m going to guess it might have something to do with the weight of the moderator. The Buckrail is a 3D print. The Mod40 is all aluminum. The weight at the end of the Sig barrel probably causes a lot of back forth up down motion at the shot. If the Sig barrel is not contained by a stiff shroud this may be your problem.

IMO 1-2” @35yds is not really “grouping”.
 
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Thanks to Robert for the felt suggestion, which has led to significant improvements, which I also discuss in the second edit of my initial post. It seems the felt allows for a gradual cushioning of the Sig's airflow through the cans, whereas before it was just so much turbulence.

The Sig has no shroud and the barrel is very secure, no whip. I'll be getting more felt and experimenting, thanks for all the advice from everyone here.
 
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Air King said:
Thanks to Robert for the felt suggestion, which has led to significant improvements, which I also discuss in the second edit of my initial post. It seems the felt allows for a gradual cushioning of the Sig's airflow through the cans, whereas before it was just so much turbulence.

The Sig has no shroud and the barrel is very secure, no whip. I'll be getting more felt and experimenting, thanks for all the advice from everyone here.
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Sweet glad it helped. The original Huma were Kevlar wrapped sections and way better in my opinion. Definitely way quieter. Wish they still offered those.
I might do some more experimenting with materials on the inside of mine. I used some super shammy material I found in garage. In my head thought it would work good haha. It for sure seemed to soften the sound. No clue how well it’ll hold up. Might have to add some wire mesh.

Rob

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Vetmx said:
I can’t use felt in any of my guns because they produce too much power. Even if it’s wrapped around a cage with tiny openings. My guns just turn it to fuzz. I use the stuff you line your toolbox drawers with. No more hairy mod holes.
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My Huma 40 is going on my airmaks krait lite standard in .25. I think it’s shooting a smidge under 40fpe. See how long it takes to blow out the front lol. I’ll be happy if it last a tin of pellets lol
 
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