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Thread: DPT Suppressor seized up

  1. #16
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    PTFE thread tape can help here, seals the threads better than grease and resists the squash out from torque of firing (this can be what tightens the things up and makes them bloody hard to remove).

    Another possible solution is screw them together tight to start with, as the sections don't get a start to torque down tighter...

    As noted it doesn't particularly matter if the things stay seized together but it offends the OCD in me so I can understand people wanting them apart. The stainless to ali joint can be one of the worst due to dissimilar metals, heating the ali section in boiling water with a frozen lump on the stainless one can help to shock the sections apart and make them easily unscrewable.

  2. #17
    Member bunji's Avatar
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    Allan Carr who l rate up there with gun smiths work l have seen any where in the world,did a lot of my rifle builds & he always said never to use any tape on the threads, only a lithium grease & the internals should be cleaned regularly with a good water/moisture dispersal spray like WD40 was all thats required ,the reason he said is suppressors suck in a lot of moisture especially if used with a cover & that moisture in turn soaks up the ammonia in the gun powder.This then acts as means for more corrosive elements to build up over time & around the rifle crown/rifling ,he always recommended a thorough clean after 40 rounds max for a short barrel hunting rifle (he did most of my Bush Pig builds)& the suppressor left off the rifles in storage with good air flow & a coating of WD40.

    The last time l brought a DPT over barrel from memory it came with a sheet warning if tape was used on threads or excessive build up was found it would void any warranty.

    While l was guiding in the US one of the clients had a huge gun collection & would have a machine gun shoot on his Ranch twice a month during summer ,guys would turn up with everything imaginable & a lot were suppressed, they all used high temp Locktite anti seize on all threads .

    I use to race Dirt Bikes so still have a lot of tools for rebuilds etc & have helped a couple of mates over the years free up stuck baffles which would happen particularly after our regular hunting /diving trips to Stewart Island, where guns would cop salt spray for a couple of weeks in the sand dunes etc & from travelling around in the big boat & dinghy,always found a small bike oil filter wrench with a wrap of leather worked ,for really stuck ones put it in a oven to warm up first,always freed them straight up .
    Micky Duck and flock like this.

  3. #18
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    I bought a pair of clamps from DPT. Suggestion from Darren. One clamp on each adjoining baffle and twist in opposite directions. Great tool. Don't need to use it very often but it's there when I need it. Very important to always remove suppressor when finished shooting and clean carbon from crown and barrel threads.

  4. #19
    Member Beetroot's Avatar
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    Quote Originally Posted by 223nut View Post
    I'm in a similar boat, never take mine apart. Have heard that the carbon builds up on the inside and reduces volume available therefore less effective, must have to put a lot of rounds through to see that happening though. Can see it being an issue with a 22 but not centrefire
    After 500 rounds of CCI SV i notice mine gets considerably less effective. Also have a noticeable decrease in accuracy and get more fliers in my groups.

    For hunting purposes you might never notice but on paper it's pretty apparent.
    My ASE rimfire suppressor is exactly the same.

  5. #20
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    Would nickel anti seize on the threads not work better than a grease with the heat involved?

  6. #21
    Member G.I_Joel's Avatar
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    I didn’t real all the comments so something similar may have already been said but Take each baffle off, hose it down with wd-40, clean it, let it dry and then just wipe a smidge of Vaseline around each thread, job done.
    Go fast, Donít suck

  7. #22
    Member G.I_Joel's Avatar
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    Quote Originally Posted by bunji View Post
    Allan Carr who l rate up there with gun smiths work l have seen any where in the world,did a lot of my rifle builds & he always said never to use any tape on the threads, only a lithium grease & the internals should be cleaned regularly with a good water/moisture dispersal spray like WD40 was all thats required ,the reason he said is suppressors suck in a lot of moisture especially if used with a cover & that moisture in turn soaks up the ammonia in the gun powder.This then acts as means for more corrosive elements to build up over time & around the rifle crown/rifling ,he always recommended a thorough clean after 40 rounds max for a short barrel hunting rifle (he did most of my Bush Pig builds)& the suppressor left off the rifles in storage with good air flow & a coating of WD40
    Allan put mine on and that’s the advice he gave me - and my comment above
    Ingrid 51 likes this.
    Go fast, Donít suck

  8. #23
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    Used to used ptfe as antiseize tape on boiler fasteners. Gets an entire f**kload hotter than most firearms for a lot longer, and the nickel high temp antiseize cooked out. The ptfe went solid where exposed but sealed where it wasn't. High temp antiseize isn't permanent enough around combustion byproducts in my experience, but each to their own.

  9. #24
    Member canross's Avatar
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    Quote Originally Posted by jono7 View Post
    Would nickel anti seize on the threads not work better than a grease with the heat involved?
    I was thinking about the same thing... my issue is whether nickel will lead to galvanic corrosion.

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    https://www.jpcfrance.eu/technical-i...on-resistance/


    A pure guess would be on molybdenum or Teflon grease to help reduce binding or galling... would probably pay to try it on an aluminium test thread first, but by all accounts they seem to fit the bill in that they are relatively inert with aluminium and not heat sensitive.

    I suspect what's happening to people is a mix of things - some mild corrosion due to fouling and moisture, some mechanical binding due to fouling, some mechanical binding due to minute amounts of galling, and some mechanical binding due to heating and cooling allowing the threads to further lock together. Judicious application of heat and cold can often free up a stuck thread... so I'm told

  10. #25
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    If you get them stuck, you can get them undone without damage with a pair of strap wrenches (easy enough to make if you've some tie downs and bits of wood lying around.

  11. #26
    Member PaulNZ's Avatar
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    No comment on whether a nickel anti-seize would actually cause galvanic corrosion in this application - I haven't looked into it to make my own mind up - but according to CRC for aluminum you want a zinc anti-seize. From their website:

    Zinc Grade is for aluminum threaded components. Used to prevent seizing during assembly or disassembly of threaded or unthreaded components fabricated from aluminum or its alloys, engaged with components fabricated from similar or dissimilar metals. It is also intended to provide corrosion protection to the metal surfaces. This type is typically used in airplane manufacturing.

    Currently on clearance pricing at NZSafetyBlackwoods for only $50.49 for a 1lb can. Should be enough to keep your suppressor from seizing for a millennia or two Or maybe someone wants to sell it on the forum at $5 an ounce?
    canross likes this.

  12. #27
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    Another vote for gentle heat with an oven or blowtorch, just to warm it up a little, then strap wrenches, homemade or otherwise, and/or wrap one end in leather and stick in a vice. Even without cleaning I'm pretty sure the life of a suppressor is a higher round count than the barrel it's on in most cases, I wouldn't sweat it if I couldn't get it apart. I think the Sonic/Neilson brand one's have a slot in each baffle and you can get a pair of wrenches for them that hook into said slots for unscrewing. It wouldn't surprise me if DPT went that way at some point.

  13. #28
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    It's the people who's suppressors have seized onto their rifles that scare me =/

  14. #29
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    I can imagine Dpt staff sitting down at smoko and laughing at all the what to do's on here and what product to use "thinking what a pack of turkeys"
    dannyb likes this.

 

 

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