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In Canada, a 3D-Printed Rifle Breaks On First Firing

Posted by timothy on from the moose-and-wolves-unimpressed dept.

Not all 3-D printed guns can encounter the smooth, uneventful success of Cody Wilson's Liberator; Daniel_Stuckey writes with this excerpt: "A Canadian has just fired the first shot from his creation, 'The Grizzly,' an entirely 3D-printed rifle. In that single shot, CanadianGunNut (his name on the DefCad forum), or "Matthew," has advanced 3D-printed firearms to yet another level. Sort of: According to his video's description, the rifle's barrel and receiver were both damaged in that single shot."

1 of 204 comments (clear)

  1. Big surprise by cold+fjord · · Score: 5, Informative

    Rifle cartridges tend to have quite a bit more power than pistol cartridges.

    Chamber pressure:

    Rifle: 7.62x51mm maximum pressure 415 MPa / 60,191 psi
    Rifle: 5.56x54mm maximum pressure 430 MPa / 62,366 psi
    Pistol: .45 ACP maximum pressure 140 MPa / 21,000 psi
    Pistol: 9x19mm maximum pressure 235 MPa / 34,084 psi
    Pistol: 9x17mm maximum pressure 148 MPa / 21,500 psi

    IIRC, the 9x17mm (.380) was used in some earlier 3D printed pistol tests with limited success.

    Most people receiving medical treatment after being shot by a pistol will live. Mortality is much higher for those shot by a rifle.

    --
    much of left-wing thought is a kind of playing with fire by people who don't even know that fire is hot - George Orwell