1. The Forum Rules have undergone some minor changes and updates.  Please take the time to read them; it will only take a couple of minutes of your time. By doing so, you lessen the chance of incurring the wrath of the moderation team or making yourself look foolish to other members.

    90% of users posting adverts in the Sales forums need to be reminded to read the rules as their posts are wrong.  This is unnecessarily time-consuming and will no longer happen - if your advert doesn't follow the Sales Rules it will be deleted and you'll have to start all over again.

    To close this box once you've read it (and the Rules), click on the X in the top right-hand corner.

    Thank you.

    AGF Staff



    Dismiss Notice
  2. A reminder of one of the Forum Rules:

    'Behaviour

    Do not make inappropriate or offensive posts - including threats, harassment, swearing, prejudice, defamation, deliberate insults or name-calling, other negative remarks about this forum, its moderators and administrators or your fellow members. Even if this is just your own personal opinion, RESPECT YOUR FELLOW MEMBERS.'

    There have been changes made to our censoring software in an attempt to help with this growing problem.

    Click the X in the top-right-hand corner to dismiss this notice.
    Dismiss Notice
  3. Dear members,

    Our membership (like our country) consists of people from all walks of life; different in far more ways than can be listed here and each with a different view based on their experience of life - regardless of their colour, religion or cultural heritage. Every single person in the UK has been born of mixed race – we are a multi-coloured and multi-cultural country.

    As many of you are aware there are a handful of individuals amongst this membership that persist in making provocative, inflammatory, racist and otherwise offensive comments. This has been happening across the forum to a certain degree but is most especially prevalent in the Adult section.

    The moderation team has tried to stay on top of this, however unfortunately because of the ‘offensive’ nature of much of its content we don’t monitor the Adult section quite as much as perhaps we should. As a result much of this behaviour has gone unnoticed unless it has been reported to us. While the team always intended to take a "light touch" approach to the Adult section it would seem that some people aren’t quite adult enough to be left unmonitored after all.

    This behaviour is, and always has been against Forum Rules as well as the specific stipulations of the Adults forum and it will no longer be tolerated. We feel it's time to draw a line in the sand and as such from this point onward offenders will receive an immediate and permanent ban from the forum.

    In order for us to achieve our goal of restoring the forum to the friendly and tolerant place it once was, we ask that ALL members be mindful of the content they post and help us to stop unacceptable behaviour by using the 'Report' tool at the bottom of any offending post - the results of which can be seen only by Admin/Moderators.

    You should all receive a copy of this message by PM. 

    To close this message box, click on the 'X' in the top-right-hand corner.

    Dismiss Notice
  4. Hotmail block emails from us entering your inbox. Unless you can setup a safe sender you will not get activation emails from the forum. Please use an alternative provider or complain to Hotmail.
    Hotmail addresses include.

    @Hotmail.co.uk @Hotmail.com @outlook.com @Live.com
    Dismiss Notice
  5. No longer allowed Postings on Politics, Religion & Controversial Off-Topic Material

    The majority of users do not want to read about these subjects and people have left the forum as a result of it – this is after all an 'Airgun' Forum. It’s all very well to say they don’t have to read it if they don't want to, but as most of us use the ‘New Posts’ button there is no easy way to avoid it.

    All AGF staff members are in favour of people being able to discuss what they want, but we have to draw the line somewhere if it is upsetting other users. We don’t want to read about these topics either.

    IMPORTANT- We now do not allow political and religion threads anywhere on the forum (including the Adult section) unless Airgun related and they must be put in the Airgun related politics section..

    Staff will not move posts for you if you put it in the wrong section – it will simply be deleted. You will then have to type it all out again and put it in the right place, so heed this warning.

    We will not tolerate bullying or personal attacks, racism or any other offensive 'isms'. we will remove these topics from the forum, we will not give you an area where you can abuse each other. We will not hesitate to ban offenders.

    To clear this text box, click on the 'X' in the top right-hand corner.

    Dismiss Notice

Bsa Scorpion Pistol Piston Upgrade??

Discussion in 'Anything Airgun Related' started by Brandon James, May 15, 2019.

  1. Brandon James

    Brandon James Brano

    Messages:
    84
    Likes Received:
    26
    Location:
    York
    Hi folks,

    I have a real soft spot for scorpion pistols and I'm thinking of tuning one. I do like them pretty much as they are but want to experiment with altering the piston head set up as I think the design is terrible that BSA used for them and their rifles.

    Has anyone tried anything such as fitting a parachute type seal , doing away with the piston head and using a softer spring?

    I'm not that technical to be honest and any pointers would be appreciated from any fonts of knowledge on here.

    It's often said they were based on the Meteor but it appears to me to be a cut down Mercury.

    Getting the right piston seal isn't straight forward and there just has to be a better set up to get the most out of these beasts. I don't mean power wise either as I will be ensuring I stick to the limit.

    It will probably be the .177 pistol I look at altering. The pistons are different and a comparison is below for anyone who's interested.

    .177 is the bottom piston, minus buffer
    .22 is the one without either head or buffer. Just their current state.

    20190514_234331.jpg 20190514_234357.jpg

    Tvm
     
    Blackmax likes this.
  2. Brandon James

    Brandon James Brano

    Messages:
    84
    Likes Received:
    26
    Location:
    York
    Anyone any advice or know of any references anywhere?
    Cheers
     
  3. Geezer

    Geezer Busy Member

    Messages:
    966
    Likes Received:
    518
    Location:
    London
  4. Brandon James

    Brandon James Brano

    Messages:
    84
    Likes Received:
    26
    Location:
    York
    Cheers Geezer,
    Yeah looked at these but in effect the same BSA principle. It's the head andxwasher I'm looking to dispense with and use a parachute washer possibly.

    I'm awaiting arrival of some bits and pieces to try. If they don't come off then I'll look at seeing if my gunsmith can make a head to fit a parachute washer.

    Just be easier if someone has done something similar and use their idea.

    Thanks again anyway :thumb:
     
    Geezer likes this.
  5. gedfinn

    gedfinn Busy Member

    Messages:
    697
    Likes Received:
    200
    Location:
    Barton on humber
    I have 3-5 of these , 2 in bits if my memory serves,
    I think that leather washer in the pic is 28 mm ? I can see by looking at your pics why they are different ? I did know as I made a 9 Fpe Bsa Buccaneer,
    Also in the pic is the original piston head & A Mercury piston head ( Same size ) & a Gas ram I picked up for a Fiver ,
    I do not know what it came out of but I cannot push it in ?

    It does not look a big job !, It needs the original hole filling in and a parachute retainer making,
    I do like these,
    Ged. STA70291.JPG STA70293.JPG
     

    Attached Files:

  6. Brandon James

    Brandon James Brano

    Messages:
    84
    Likes Received:
    26
    Location:
    York
    Cheers Ged,

    The latest one I picked up had a washer sat behind the piston head in place of the buffer and protruded slightly but was split so whatever it was possibly supposed to be doing it wasn't anymore.

    Once I work out an easy way of doing something with these I'll update the post. Could be months:shrug:
     
  7. gixxer

    gixxer Busy Member

    Messages:
    982
    Likes Received:
    16
    Location:
    birmingham
    Tr Robb head. Tried one and the o ring groove was too tight ,didn't work for me.
    I always wanted to get a adapter made to utilise the 28mm rws blue seal.
    That would be my choice
     
    Brandon James likes this.

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice