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Todays Tinkering - Air Arms Q-tec Moderator Internals...

Discussion in 'Technical' started by Halinfax, Aug 17, 2020.

  1. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Gentlemen... I have recently been asked to "see IF I can do owt" with an Air Arms Q-tec calibre specific moderator. Without going into any details of the mod... heres what we did.

    CAVEAT.. Many thanks goes to @Dag for his incisive information when he overhauled his unit a while ago.

    Upon initial investigation of the mod, everything seemed ok but.. trying to remove the end caps... well that was a challenge in itself. It seemed like the Air Arms Loctite Monkey was working overtime on the day this one was assembled...!!!!

    So, after making a split hardwood clamp (to hold the muzzle cap without damaging it...) and using the electric heat gun to try and soften the threaded interface... I managed yo get both barrel and muzzle caps of.. only to be met by the volume of dried on and hardened Loctite adhesive (the AA monkey MUST have earnt quite a bonus on this one......)

    Removing all the internals and after close inspection showed the signs of what could have possible been a/the cause for the mod not working quite right.

    The internal cones of the baffle spacers were quite gnarly and mis-shapen... so it was necessary to clean and deburr them.

    BUT how to do it without cutting my fingertips to ribbons and mis-shaping the cone section dramatically.

    We made a polishing tool that would :_

    1) Locate in the cones centre hole
    2) Deburr the clipped cone
    3) Llightly radius the edges.

    Once made, a bit of 1mm thick neoprene was put onto the guide pin, and then a piece of fine emery paper stuck onto it..

    The baffle rings were stuck in the lathe and the edges of the cones had the faced flushed and repaired... using the special tool we made... It worked a treat..

    The internal bore of the ally tube also had some deep scores within it.. so.. the trusty old spring loaded 3 legged bore polisher/honer came out and we soon dressed the internal diameter of the tube up too.

    The end caps had all the Loctite adhesive cleaned off them (had to use a thread file to get the deeper harder bits out...)

    New O rings were also fitted to the baffle bodies as 2 of the old ones had been damaged.

    The unit was fully re-assembled and tested on the SMK CP1 (same barrel diameter). Not bad at all.....

    Just need to get some feedback now from its owner and to see how its doing.

    Heres a few photos of the internals an how/what we did... Hope it helps..

    20200812_133227.jpg 20200812_133235.jpg 20200812_140108.jpg 20200812_140127.jpg 20200812_140142.jpg 20200812_140202.jpg 20200812_140206.jpg 20200812_140210.jpg 20200812_140306.jpg 20200812_140330.jpg 20200812_140835.jpg 20200812_141440.jpg 20200812_143943.jpg 20200812_144940.jpg 20200812_145239.jpg 20200812_145253.jpg 20200812_145345.jpg 20200812_153026.jpg 20200814_141403.jpg 20200814_141751.jpg
     
    Tim_B, richard.g, Nubble and 5 others like this.
  2. Ian george

    Ian george Engaging Member

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    Nice one, pal.
     
    Halinfax likes this.
  3. Bozz

    Bozz Posting Addict

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    Nice work there Halinfax
     
    Halinfax likes this.
  4. Tim_B

    Tim_B Major Poster

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    I have one of these for a .177 in the shed - accuracy was shocking.....maybe a similar cause.

    thanks for the post
     
    Halinfax likes this.
  5. john79

    john79 sywell ft club

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    What was the issue with this silencer before you got your hands on it?

    ta
     
  6. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    The owner of the unit was not happy with it and asked if I could do anything to repair it.

    From what I can gather, there was an accuracy issue.
     
    john79 likes this.
  7. ped

    ped Big Poster

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    nice work as always mate
     
    Halinfax likes this.
  8. Jamex2.2

    Jamex2.2 Engaging Member

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    Location:
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    FWIW, I use a Q-Tec on my S400 classic and it tightens the groups up - albeit with a lower poi.
     

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