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Shooting Forum - Firearms licencing information


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Sound Moderators

  • 29-03-2021 12:11am
    #1
    JP22
    Registered Users, Registered Users 2 Posts: 596 ✭✭✭


    It may be a stupid question, then again we are in crazy times and if you don’t know, you don’t know and you have to ask.

    Are all rifle sound mods screw on?, or, are there non screw-on mods available.

    Reason for asking is simple, if one has an old rifle with a “dog knot” at muzzle and you want to keep the rifle original and not thread it. Additionally, some say if you alter the “dog knot” or thread it; it opens up the muzzle resulting in lack of accuracy.

    UPDATE

    I found the answer in another thread by PSXDupe. Go to link hereunder and look for Silencer adapter for non threaded barrel.
    PSXDupe wrote: »
    https://www.suppressor-thread-adapter.com/

    These guys should be able to help, based in France. I've used them before, excellent service and quality

    They do custom adapters.


Comments

  • #2
    otmmyboy2
    Moderators, Sports Moderators Posts: 1,708 Mod ✭✭✭✭otmmyboy2


    JP22 wrote: »
    It may be a stupid question, then again we are in crazy times and if you don’t know, you don’t know and you have to ask.

    Are all rifle sound mods screw on?, or, are there non screw-on mods available.

    Reason for asking is simple, if one has an old rifle with a “dog knot” at muzzle and you want to keep the rifle original and not thread it. Additionally, some say if you alter the “dog knot” or thread it; it opens up the muzzle resulting in lack of accuracy.

    Interesting, never heard of this "dog knot" thing.
    Got a photo by any chance?

    There are adapters which you can get which mount by set screw onto an unthreaded barrel, which might work?

    Alternatively if you do decide to thread it and are concerned about the lack of accuracy why not get it re-crowned at the same time?
    Most who do one will also do the other.

    Never forget, the end goal is zero firearms of any type.

    S.I. No. 187/1972 - Firearms (Temporary Custody) Order - Firearms seized

    S.I. No. 21/2008 - Firearms (Restricted Firearms and Ammunition) Order 2008 - Firearm types restricted

    Criminal Justice (Miscellaneous Provisions) Act 2009 - Firearms banned & grandfathered

    S.I. No. 420/2019 - Magazine ban, ammo storage & transport restricted

    Criminal Justice (Miscellaneous Provisions) Act 2023 - 2023 Firearm Ban (retroactive to 8 years prior)



  • #3
    cookimonster
    Registered Users, Registered Users 2 Posts: 2,759 ✭✭✭cookimonster


    By "dog knot" I assume you are talking about a reverse taper or were the muzzel end of the barrel is considerably wider in diameter then the majority of the barrel. I think some air rifles have this feature.

    Unless changing the harmonics of the barrel, surely the threading of the outer material of the muzzle shouldn't effect accuracy. Some moderators don't effect accuracy, (never noticed a difference with .22lr and subsand was lucky with my Wildcat P8 not effecting POI) while others will create enough of a difference to make the rifle unusable unless rezeroed when not in use.


  • #4
    JP22
    Registered Users, Registered Users 2 Posts: 596 ✭✭✭JP22


    otmmyboy2 wrote: »
    Interesting, never heard of this "dog knot" thing.

    Dog knot - when the last 2/3 inches of the muzzle is thicker than the rest of the barrel. Look at Anschutz and some early model Brno rifles.

    cookimonster wrote: »
    By "dog knot" I assume you are talking about a reverse taper or were the muzzel end of the barrel is considerably wider in diameter then the majority of the barrel. .... Unless changing the harmonics of the barrel, surely the threading of the outer material of the muzzle shouldn't effect accuracy.

    Its reported that when threading the muzzle (basically removing material) causes the inner bore at muzzle to open up a tad which may effect accuracy.

    It was just one of those crazy questions we all have from time to time.


  • #5
    schmidt223
    Registered Users, Registered Users 2 Posts: 35 ✭schmidt223


    JP22 wrote: »
    Dog knot - when the last 2/3 inches of the muzzle is thicker than the rest of the barrel. Look at Anschutz and some early model Brno rifles.


    I bought an old .22 hornet Anschutz 1730 that from what I can tell was rebarelled in 1999. Dom Byrne threaded the barrel for me and have had absolutely no issues with accuracy.


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