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Geissele Super Dynamic Trigger

This product is regulated by ITAR. It can only be shipped in the USA.

Video | What’s Included | Specs | Pictures | FAQ | Restrictions | Related Info

The Geissele Super Dynamic trigger allows precise and accurate trigger control under various usage conditions. They make a great drop-in replacement for that old, clunky Mil-Spec trigger found in most AR-15/AR-10 rifles.

The SD-C is what Geissele considers a combat trigger, with a heavier pull and a more pronounced break, while the SD-E has a lighter pull and a sharp, quick break. They are precision machined from S7 tool steel which provides excellent impact resistance, strength, and toughness. Geissele triggers are known for their consistent, long-lasting performance.

The Super Dynamic-Combat (SD-C) and Super Dynamic-Enhanced (SD-E) provide the same two-stage trigger pull as the Super Semi-Automatic (SSA) and Super Semi-Automatic Enhanced (SSA-E). But instead of the M4 curve, the Super Dynamic line features a flat trigger bow.

This is mainly a preference thing, so if you prefer the standard trigger bow, you can find the SSA and SSA-E HERE.


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One Geissele Super Dynamic trigger (SD-C/SD-E) ; two trigger pins; one hammer spring and one trigger spring (pre-installed); 4ml ALG go-juice lubricant; slave pin

Lost in the confusing acronyms of Geissele triggers? Us too, which is why we made THIS quick reference chart to help you compare your options.

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Choosing your Super Dynamic Trigger

Super Dynamic Combat (SD-C)

  • Rugged, non-adjustable combat trigger with a sear design that provides a wide margin of safety against unintentional discharges yet still gives the operator a sharp, repeatable trigger release.
  • Heavier trigger pull (4.25 – 4.75 lbs)
  • Longer, more pronounced break. Some say its like “breaking a carrot.”

Super Dynamic Enhanced (SD-E)

  • Finely-tuned, non-adjustable two-stage trigger providing enhanced trigger control and weapon accuracy while maintaining the robustness and reliability of Geissele’s combat-proven two-stage trigger.
  • Lighter trigger pull (2.9 – 3.8 lbs)
  • Sharp, crisp break. Some say its like “breaking a candy cane.”


  • Non-adjustable, precision, two-stage trigger
  • Made from S7 Tool Steel and precision machined from the latest wire EDM technology
  • All parts are finished in durable corrosion-resistant black oxide
  • Pre-installed hammer and trigger springs, along with an included slave pin, make installation trouble-free
  • Not compatible with the MCX/MPX platform

Made in the USA.

View the User Manual HERE.


Stage TypeTwo-Stage
Pull Weight (1st Stage)2.75 – 3.0 lbs (SD-C)
2.0 – 2.5 lbs (SD-E)
Pull Weight (2nd Stage)1.5 – 1.75 lbs (SD-C)
0.9 – 1.3 lbs (SD-E)
Pull Weight (total)4.25 – 4.75 lbs (SD-C)
2.9 – 3.8lbs (SD-E)
Trigger BowFlat
Pin SizeMil-Spec

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Which is better? Curved or Flat?
One is not necessarily better than the other. It all comes down to personal preference. Just remember, the best trigger is the one you get out and train with. IYSYS.

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This product is restricted by International Traffic in Arms Regulations (ITAR) and cannot be shipped outside of the US.

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Consistency, Recoil, Trigger Management With a Stock M4 – Video – T.REX ARMS

How Should You Set Up A Rifle? – Video – T.REX ARMS

ONE TAKE: Lucas Botkin’s 13.7 BCM Carbine – Video – T.REX ARMS

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