Moderators. Cleaning “take-apart” Hausken Moderators.

[royr]

Info’ – I have 2 x JD184 Hausken moderators.

Hausken moderators have two main parts; an internal central milled one-piece billet which is then encased by a cylindrical tube, threaded at one end.

A special Hausken 12–sided nut is inserted into the base of the moderator and this unscrews the internal billet, then it should slide out of the outer tube – ONLY IT DOESN’T! The build-up of propellant deposits on the internal wall of the tube prevented this happening.

I spoke with importers RUAG and e-mailed Hausken for a “correct way” to take the moderator apart. Unfortunately no definitive answer forthcoming; except clean more frequently to avoid build-up?
All this of course is dependent on how much of the propellant is burnt in the rifle barrel and how much is burnt in the moderator.

Anyhow, my solution was to purchase a larger Ultrasonic Cleaner, the 3L GT SONIC; the 3L water tank takes a 220mm/8.5inch moderator.
Combined with my usual LYMAN TURBO SONIC CASE CLEANING SOLUTION, this Ultrasonic Cleaner managed to dissolve and dislodge the internal deposits, and allow me to slide the two pieces apart.

Hope this is of use to folk.
Regards,
RoyR

 

[Edinburgh Rifles]

Why are you wanting to clean it?
They are noisier when clean

 

[Cut+Squirt]

How do these moderators compare in terms of sound reduction relative to my old firm favourite of the Jet - Z compact?

 

[royr]

Afternoon Cadex.
In the past I've had moderators made of STEEL, heavy and prone to rust and with internal rust therein lies a potential problem. When stalking with a rifle some tiny rust flakes could fall down into the rifle barrel, not good! I actually had this happen to me, so I would now not entertain a Jet-Z or any steel moderator when aluminium, aircraft grade, moderators are currently available.
From my limited research, generally speaking like for like diameter + length, the aluminium moderators are less heavy, do not rust and are better at noise reduction.

Afternoon Edinburgh Rifles.
As far as I'm aware, the engineering design, function and specifications regarding slowing and cooling of the propellant gases of any moderator is dependent on it being like new and clean? Hausken acknowledge this aspect, and manufacture their moderators in two parts so they can be taken apart to facilitate cleaning. Allowing a properly designed moderator to be clogged up with debris has to be detrimental to its claimed specification, gas flow and efficiency. I choose to keep my two moderators clean, other's may choose differently.

A bonus of purchasing this larger Ultra Sonic Cleaner, the reservoir tank will easily hold 100 x 243 brass cases and probably 100 x 308.

Best Regards
RoyR

 

[1894]

Yup my Hauskens are a sod to seperate. Certainly not for evertday. I find the XTRM mesh gets coked up and needs cleaning about every 300 shots or so to stay as quiet

What they really hate is damp. Stick on a radiator after shooting . They are as quiet or quieter than a JetZ but disposable in comparison.

 

[1894]

As for dirty mods being quieter ASE are now reccomending ultrasonic cleaning based on weight gain. The added carbon reduces volume. Ultrasonic cleaning of my 11 year old 4,000 round Jet Z removed 10grams of carbon ie 150grains of powder. Thats a lot of crap taking up space for gases to expand in. It did seem fractionaly quieter

 

[Steff]

Yup my Hauskens are a sod to seperate. Certainly not for evertday. I find the XTRM mesh gets coked up and needs cleaning about every 300 shots or so to stay as quiet

What they really hate is damp. Stick on a radiator after shooting . They are as quiet or quieter than a JetZ but disposable in comparison.

How do you clean the mesh other than in an ultrasonic bath? The mesh is really the one thing that keeps me from doing this regularly.

 

[1894]

Take the mesh out and clean in US bath then reassemble

 

[Edinburgh Rifles]

I find 50-60,000 psi of hot gas moves most debris out of a Moderator...
My days of cleaning mods and fighting with clogged threads are long gone.

 

[muddy42]

Afternoon Cadex.
In the past I've had moderators made of STEEL, heavy and prone to rust and with internal rust therein lies a potential problem. When stalking with a rifle some tiny rust flakes could fall down into the rifle barrel, not good! I actually had this happen to me, so I would now not entertain a Jet-Z or any steel moderator when aluminium, aircraft grade, moderators are currently available.
From my limited research, generally speaking like for like diameter + length, the aluminium moderators are less heavy, do not rust and are better at noise reduction.

Afternoon Edinburgh Rifles.
As far as I'm aware, the engineering design, function and specifications regarding slowing and cooling of the propellant gases of any moderator is dependent on it being like new and clean? Hausken acknowledge this aspect, and manufacture their moderators in two parts so they can be taken apart to facilitate cleaning. Allowing a properly designed moderator to be clogged up with debris has to be detrimental to its claimed specification, gas flow and efficiency. I choose to keep my two moderators clean, other's may choose differently.

A bonus of purchasing this larger Ultra Sonic Cleaner, the reservoir tank will easily hold 100 x 243 brass cases and probably 100 x 308.

Best Regards
RoyR

Like anything steel, it will only rust if left wet. I have had a jet z for over 10 years that is going strong. Put it on a radiator or AGA after use and it will last a long time.

 

[MarinePMI]

Place it in a jar with your choice of cleaning solution. Then put that jar in an US cleaner, fill with water, and let the two elements do their thing.

And IME, dirty suppressors are not quieter than clean ones.

 

[royr]

Like anything steel, it will only rust if left wet. I have had a jet z for over 10 years that is going strong. Put it on a radiator or AGA after use and it will last a long time.

Cannot vouch for JetZ .

Had a Reflex T8 on foxing rifle, out in all weathers and that rusted internally, regardless of WD40 sprayed inside and drying in airing cupboard. Accuracy waned, I wondered why, found little flakes of rust dropping down the barrel from the T8 onto the bolt face. This, to me, was a dangerous prospect, so scrapped it via a trade in for the non ferrous take-apart Hausken. Vowed never to use any steel moderator again, in my experience they are a liability.
Each to their own.

Regards
RoyR

 

[muddy42]

Cannot vouch for JetZ .

Had a Reflex T8 on foxing rifle, out in all weathers and that rusted internally, regardless of WD40 sprayed inside and drying in airing cupboard. Accuracy waned, I wondered why, found little flakes of rust dropping down the barrel from the T8 onto the bolt face. This, to me, was a dangerous prospect, so scrapped it via a trade in for the non ferrous take-apart Hausken. Vowed never to use any steel moderator again, in my experience they are a liability.
Each to their own.

Regards
RoyR

Thanks for the warning. I have had two jetz mods, one for c.15 years, the other for 8 years. They too have been out in all weathers, but always dried on a radiator or aga afterwards. I lightly oil occasionally. They are not strippable, but from what I can see there is no rust inside either.