3-D Printers Rejoice – BAD-ASS Selectors Available for Printing

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Battle Arms Development really created a “Bad ASS” design with their ambi-safety systems. Taking it a step further for those who want to print at home, user Down0047 has posted up 3-D CAD files of the system allowing users to design and print their own selectors. 

I am especially a fan of this, as those who like to experiment and design their own levers now have a solid and proven base to print their levers for. Of course, the selector would be a plastic, so these home-printed kits would not be as durable as their metallic cousins.

*Author’s Note: Don’t pirate someone’s copyrighted and patented works. Ensure any usage of these files is for your personal enjoyment in creating novel levers for your personal usage. I have personally tried 3-D printed safety/selector components at work and they will NOT stand up to tactical abuse. 



Nathan S.

One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

Nathan can be reached at Nathan.S@TheFirearmBlog.com

The above post is my opinion and does not reflect the views of any company or organization.


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  • kregano

    Well, if the 3D printer copyright exemption goes through, maybe someone can come up with some better materials for use in 3D printers.

    • Budogunner

      Google “Lost PLA Casting”. While some people are working on printable metals, PLA can be used like wax right now in the investment casting process. There are lots of makers doing this with aluminum already, so I am curious to see if this takes off.

  • Budogunner

    Outstanding. I wasn’t aware of grab cad before. Thanks for the heads-up.

  • frewd

    Very good!

    http://xyz.gl

  • plus

    May I ask a dumb question that is it related to semi/auto’s fire mode? Selector can make changes of semi/auto, can full auto been achieved by changing selector?

    I don’t have a gun so I can’t answer this myself……

    • Budogunner

      By itself, no. The fire control group differs between semi-only and select-fire guns. You would need an auto sear (and the associated NFA Tax stamp) to do a true conversion. In a semi-auto fire control group the sear will stop the hammer after every trigger pull.

      Of course, there are the lightning links that disengage the sear, but even those are NFA restricted items and expensive these days.

      Best, cheap way to get the rapid fire experience is a slide fire stock. They are unregulated, BATFE approved, and work reasonably well with practice. If you don’t like the price (which I agree is absurd) there are independently designed bump fire stock designs on the Web available for 3D printing. I’d still read BATFE opinion letters about the slide fire stock and the ill fated Akins Accelerator first to make sure the design didn’t run afoul of BATFE guidelines (no springs, for example).

      The question then becomes, “How long can I afford to dump ammo like this? “

      • Plus

        Thanks for the answer.