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Impact Compact Home Made

Discussion in 'Anything Airgun Related' started by Figgy, Apr 6, 2020.

  1. Figgy

    Figgy Very Active

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    My aluminium tube came today so got busy making a 30mm centre section for impact compact.
    Needs outside finishing more to remove marks and I am going to make a longer section 75mm then I can swap and change. Screenshot_20200406-181643.jpg
    Screenshot_20200406-181715.jpg
     
  2. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    Blimey did you cut that thread with a tip-tool it's very fine!

    Needs to be longer IMO, still looks a bit on the shortside, I fitted the bottle to the DTT today, nothing better to do really!
     
  3. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    Do you want to know how long the factory center section is? I can measure one.
     
    Figgy likes this.
  4. Makarova

    Makarova Engaging Member

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    Looking great,
    I have been trying to find something like this to baffle the noise from my compact. Would like to hear more about the progress.
    Currently using a HW silencer.
     

    Attached Files:

    evenbad likes this.
  5. Figgy

    Figgy Very Active

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    Cheers mark yes if you could measure it.

    Confession time to be honest I cut two bits one 60mm to end up with around a 50mm section 85mm to get 75mm between the end caps. As you say fine 1mm threads, internally the long one caught and ripped itself out the jaws. They end up very thin.
    The second shorter one, the the threads tore up, I cut the long bit down and used it as a test that works hence 30mm between the caps.
    I am going to make a internal has threading bar, carbide thread bits tear it out even with WD40.
    Tomorrow I'll be having another go.
     
    evenbad likes this.
  6. Figgy

    Figgy Very Active

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    Quick update, I've made a section 75mm long same as the original. Still need to finish the surface fully and spray Matt black.
    Tried the original size section in overall length of 125mm or 5" old money silencer and then added the 30mm peice I made other day, glad to say it's super quiet for back garden plinking. Can now play with how long I want for out in the field.
    Couple of pics.
    Screenshot_20200408-144611.jpg Screenshot_20200408-144448.jpg
     
    TR158 and evenbad like this.
  7. evenbad

    evenbad Evenbad

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    Looking good where did you source small air bottle from please
     
  8. mick 1986

    mick 1986 Keyboard Hero

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    To aid cutting the aluminium, try using some paraffin degreaser on a paintbrush. Little and often.
     
    bucketboy likes this.
  9. bucketboy

    bucketboy Very Active

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    Nicely done figgy, what length is the barrel?
    What’s the overall length too please?

    Bb
     
  10. Figgy

    Figgy Very Active

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    The liner is 500mm the outer barrel.is shorter.
    Than standard. The barrel outer is 160mm total to back of threads and sticks out125mm from the action frame where pic rails are in sides.
    Total length of the compact gun is 25" from curve of buttpad to threads on muzzle.

    Internal threads on the aluminium is a pig to do diameter is turned internally to 33.9 mm outer diameter of silencer is 34.8 so less than mil wall thickness and needs a blank shoulder too.. first attempt today ended up too thin, I cut threads a little deep. Shoulder was like tin foil.
    There's a reason they done on CNC. Took me about two and half hours shaping and honing has internal threading tool. Then threading and turning the section
    I used WD40 as lube to stop the galling and tearing.
    I think the grade of aluminium I got isn't as hard as what FX use.
     
    bucketboy likes this.
  11. Figgy

    Figgy Very Active

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    I didn't it's what comes as standard on the compact at 300cc.
    Best fittings sell the same size bottle.
     
    evenbad likes this.
  12. evenbad

    evenbad Evenbad

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    Will have a look thank you for your reply
     
  13. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    Forgot to say I did measure the original and its 81mm long with a 6mm threaded section so 75mm length added you are correct.

    Nice job in the end!
     
    Figgy likes this.
  14. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    Hands off it's mine next LOL!
     
    Figgy likes this.
  15. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    If you order the BEST FITTINGS one MAKE SURE to tell them you need the valve spacers as it's for an IMPACT, otherwise their bottle neck will foul on the bipod rail!
     
  16. Figgy

    Figgy Very Active

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    Cheers for the kind words, just been out in the garden trying it. It's stupidly quiet with both sections in.
    I think FX have changed the internals on the latest batch of Impacts. It no longer has the ping and noise from inside when firing.
     
  17. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    I have 6 of those mods, I wonder how quiet an 18" long one would be?
     
    Figgy likes this.
  18. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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  19. Figgy

    Figgy Very Active

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    @Spray1Mark go on put two together and see how quiet it is.

    Thanks for the video, after watching I now know why they put the two silencer end caps in because the certainly don't work to quieten it down. It's for the FX chrono to have something to attach to in front of the bottle.
     
    Last edited: Apr 8, 2020
    bucketboy likes this.
  20. Spray1Mark

    Spray1Mark I see light at the end of the tunnel!

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    Can do, on what caliber though? in truth I dont suspect it will actually be that much quieter!
     

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