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BSA Ultra blowback shroud

Discussion in 'Anything Airgun Related' started by mattyts, Jul 18, 2014.

  1. mattyts

    mattyts Donator

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    Me & Stevemandm have been working on this for a while now,we've done shrouds for our Ultra before,the first ones were just cosmetic,consisting of a carbon tube that faced up against a muzzle brake or silencer,then we moved onto shrouds with baffles and now,one with vents.

    This one is 12 1/2 inches long and screws into the Ultras 9 1/2 inch barrel giving a 3 inch extension which consists of 3 baffle compartments with the end one not being sealed off,as to allow the air to blow backwards and out of the vents.

    One end of the shroud contains the baffles,held in place by the aluminium end cap which houses the 1/2 UNF thread to locate onto the barrel,the other end has a delrin plug which helps keep everything aligned in relation to the barrel and the breech,chose delrin because it's soft and wont mark the barrel or the breech as it's been slid on or off.

    The baffles are packed with a dense filter like material which is useful as there's no stray fibers.

    The 4 vents (2 x 2 holes) can be placed in 2 positions so they are either visible or pointing up/down towards the cylinder and scope.

    Anyway,picture time...

    The shroud:
    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]


    And..it fitted:
    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]


    It's fairly quiet,not as quiet as a dedicated silencer but it's also not as long and looks cooler ;)

    Hope you all like it :rolleyes:
     
  2. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Proper job mate, how's it performing??

    Bet its not as good as mine:D
     
  3. mattyts

    mattyts Donator

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    Better than previous versions :p

    How's yours? got any pics?
     
  4. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    It works very well, louder at the shooters end because of some of the blast coming out the vents,

    Down range its bloody magic, pics to follow!
     
    Last edited: Jul 18, 2014
  5. mattyts

    mattyts Donator

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    Make it yourself Stevie? Also,where did you get that fine mesh to cover the holes? after some myself
     
  6. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

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    good idea matty :rolleyes:
     
  7. mattyts

    mattyts Donator

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    Thanks,just occurred to me,all by itself :rolleyes:
     
  8. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    All home brew apart from the back venting bush that screws on the barrel, UK Neil did the hard bit!!

    The shroud is only 25mm black conduit.

    I have some mesh if you want it mate:)
     
  9. mattyts

    mattyts Donator

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    Looks spot on mate,I'll take some of that mesh too,thanks!
     
  10. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    No bother mate, the mesh is 3"x 5" in size,

    pm your address and will post tomorrow:)
     
  11. Trouserferret

    Trouserferret Donator

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    the first time I did summat like this, it was made from a pound shop bicycle pump, some big rubber washers and brillo pads.

    A lot of time and effort went into my creation.

    My creation went in the bin. I couldn't centre it properly, kept clipping pellets. What you two have done looks amazing, a proper job. I'd love to be able to putter about and come up with that. Good on ya. :up:
     
  12. stevemandm

    stevemandm Honorary Member

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    my remit to matty was to design and manufacture a shroud with the primary objective being to strip air from around the pellet, and the silencing attributes were secondary. also, for it to be as short as possible. I think the boy done good !
     
  13. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    A grand job indeed mate!

    The ultra looks and handles better when its kept to a minimal length!!
     
  14. Trouserferret

    Trouserferret Donator

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    The boy done great!

    A brilliant piece. A few bits of scouring pad and a couple of washers and you've got summat that well exceeds the brief. In fact it exceeds the brief already...

    Looks great on the rifle, too. And that's one of the most important things!

    Edit: Trying to do this on a phone is terrible! Keep trying to edit this and it wont let me! Good on ya matty, wish I had the opportunity at your age. The redneck solutions I've come up with work (sometimes) but ain't nearly as gorgeous as that.
     
    Last edited: Jul 19, 2014
  15. lone wolf

    lone wolf Pro Poster

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    Great job there mate! That's spot on for the little ultra,nice and compact
    How about some fine mesh/gores for the vents?

    Thumbs up to you

    Gaz
     
  16. lone wolf

    lone wolf Pro Poster

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    Forget the mesh bit mate just read the thread after posting lol

    Gaz
     
  17. jay5488

    jay5488 Donator

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    Another one for the non se, bah chuffing humbug!!!!!!!!
    ;-)
     
  18. mattyts

    mattyts Donator

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    Because our breeches are straight and not cock eyed :p
     
  19. jay5488

    jay5488 Donator

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    Bloody wonky breach is the Bain of my life!!!!!!!!!
     
  20. stevemandm

    stevemandm Honorary Member

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    and what about the ultra mate ? :D
     

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