Geissele Super Dynamic 3Gun Trigger in Slow Motion

Alan Lardieri uses a cutaway AR lower and a high speed video camera to capture the full range of motion of the Geissele SD3G trigger. He shows it at 300, 600, 1200, and 2400 FPS.

Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at


  • strongarm

    What a meaningless footage. Slow motion capability of a camera should not be wasted for an event watchable by bare eyes. Anybody can follow the hammer transmit from breechbolt ride over to cocked position simply manually actuating the related pieces. But the quality of
    parts cutting is really bad and watchable. Congratulations daring to demonstrate them.

    • dp

      Small production batch. They can conventionally (gang mill) cut it, wire cut or grind in stack or individually. The last is the proper operation to use. To get profit they will do what suits them the best.

  • dp

    With such a small engagement (and I realize this is not military trigger), what is reliability it will hold? Further, it implies accuracy and cost. Regular trigger is quite tight on tolerances as is.

    • BillC

      Considering it is a 3-Gun trigger, which is a sport, military reliableness takes a very distant back seat. If one requires more reliability, Giessele makes other great and nearly as fast triggers that are designed not for sport, for which are used by special troops.

      • dp

        Ok, I can appreciate that. I was involved on several occasions with tolerance studies at such set in past. There are always penalties behind ‘advantages’.

  • Dan-O

    The 1980’s called, they want your intro back.
    Also, it needs more Stan Bush to make it a solid entry.

  • Delta7525 .

    That’s a terrible cutaway job.