“hop-up” in BB guns

Discussion in 'Airguns' started by NRADAVE, Feb 25, 2019.

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  1. cobalt327

    cobalt327 Member

    Mar 27, 2013
    For a extensive O-ring material chemical resistance list, click The O-ring Store.

    TLDR- Acetone isn't recommended for buna, denatured alcohol is okay.
    Last edited: Jun 17, 2019
  2. Inimical Jim

    Inimical Jim Member

    Aug 12, 2016
    Has anyone considered using a rare earth magnet attached outside the shot tube? I wonder if it would make enough of a "magnetic bump" to get the bb rotating.

    NRADAVE Member

    Feb 19, 2019
    There’s are several “discussions” And some trials regarding the use of magnets. “Bob E” on 3/18/19 posted on this thread a “blog” from Pyramydair
    concerning a successful attempt with magnets.
    And I know somewhere on the “putting more power —-“ thread there’s talk about it. Youll have to read thru it ——lots of info.
    Cvans likes this.
  4. JimmyDei

    JimmyDei Member

    Mar 23, 2020
    Hi Guys....Noob to the site.
    I’ve been very intrigued by this thread and I too have been contemplating installing a hop up to my:
    Crosman DPMS SBR 4.5mm bb airgun
    I played airsoft for years and have always kept my hand in the sport however recently I’ve been starting a collection of 4.5mm/.177 shooters.
    I love this Crosman it’s decent fun but was more than disappointed in its ability to strength out that increased FPS. I realise a good hop up makes this possible in airsoft. So I started looking and found this thread.

    I can appreciate it’s of some age but if anyone is still following this or has achieved success, please take the time to reach out.

    I too have started the process and am keen to share what I have planned. Any help or advice would be more than welcomed.
    I’m by no means a gunsmith or qualified engineer, however I am a decent handy man/mechanically minded bloke, not shy to tools and the shed. Lol

    Look forward to hearing from someone/anyone

    Attached Files:

    Wingnuts likes this.
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