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Geissele Automatics AR-15 Super Dynamic Enhanced Trigger - Two Stage - .154"

Manufactured by Geissele Automatics
MPN: 05-167
Manufactured by Geissele Automatics
38 Reviews

In Stock

Orders of non-FFL items will ship same-day if placed before 3:30pm CST (M-F). FFL orders will ship within 5 business days if transfer details are provided.

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The Geissele SD-E trigger installs in your lower receiver in the same way that a Mil-Spec trigger is installed. It uses a standard .154” trigger and hammer pin so it will fit in any Mil-Spec stripped lower receiver. It features a flat trigger bow that gives you more leverage to reduce perceived trigger pull weight and improves the tactile feedback so you can feel the reset and pull the trigger faster. Not only does it work in 5.56 or .223 AR-15 rifles, but it works in .308 AR-10 pattern rifles. Each trigger is precision EDM wire cut from heavy duty tool steel with a durable black finish giving you the reliability and durability you can depend on.

  • Uses Mil-Spec .154” trigger pins for maximum compatibility with lower receivers
  • Works with 5.56/.223 and .308 AR pattern rifles
  • Designed as a target and precision trigger
  • Smooth, consistent two-stage trigger pull
  • Has a 3.5lb total trigger pull weight
  • EDM wire cut from heavy duty tool steel
  • Features a flat trigger bow that reduces perceived trigger weight and improves tactile feedback
Note: Trigger pull weights are approximate and may vary slightly between rifles.

When building or upgrading your AR-15 rifle, one of the most important components is the trigger. There are many triggers out there so you must ask yourself what are you are going to do with the rifle. Are you going to use it for plinking at the range, home defense, competition, or long-range precision shooting? The answer of this question will help you to understand what trigger you will need. The Geissele Super Dynamic Enhanced (SD-E) Trigger is designed specifically for target and precision shooting while still being reliable enough to be used in combat situations. It features the same short length of pull and quick reset in the 3-gun competition version, but has a 3.5lb trigger pull. Although it is a two-stage trigger instead of the hybrid system, it still has the flat trigger bow for quick and controlled shots. The SD-E is the perfect upgrade to your AR-15 weapon system that will greatly improve your accuracy and reliability.

Geissele Automatics manufactures confidence, offering quality triggers and components for the warfighter and competitor. They were established in 2004 with the mission to build the highest quality, reliable triggers for competition and their first trigger, the Hi-Speed National Match trigger, was so popular that they were asked by the Department of Defense to produce a select-fire trigger for the United States Special Operations. Again, it was a success and Geissele decided to bring a semi-automatic version to the civilian market for law enforcement and personal protection.
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BrandGeissele Automatics
Drop InStandard Assembly
Manufacturer.Geissele Automatics
Trigger BowFlat
TypeTwo Stage
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

38 reviews

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Geissele Trigger


I feel these are the best triggers on the market in terms of price & simplicity in design. Their reliability & function are outstanding.



Already have one of these guys, and knew I had to buy another for my .308 build. The pull is light but crisp and clean. Incredible trigger, this while be going into my DMR/precision build because I love the flat bow and the light trigger pull.

Geissele Super Dynamic Enhanced Two Stage Trigger


Awesome Product. Awesome Retailer. Awesome Shippoing

Exactly as wanted


Been wanting one for a while after trying several different ones in friends AR's. And being on sale just pushed it into the purchase box that much faster. I like the first stage for the take up feel, and then the brisk short final wall to release is exactly as wanted.

Great Trigger


Excellent trigger (I currently use both an SE-E and SD-C). Wouldn't recommend the SD-E for a combat/carry rifle but it is definitely the trigger for a longrange 'shooter' or scoped rifle (400m +). Thanks for shipping in a box vice the old method of using a padded envelope.

Super Dynamic Enhanced.


For an AR unless you are doing long range target, varmit or 3 gun competition, it is too light. Materials, construction, all top notch. First stage great, second way to light for a carry rifle in the field. I then purchased the SSA 2 stage and it was perfect. Less money too and now I am stuck with this as cannot return once opened.....



Hands down best trigger I've ever used.

Great deal, great service, great product!


I ordered a Geissele SD Enhanced trigger on Primary Arms' Black Friday Special (which beat everybody else's price by $30.00).Shipping was VERY reasonable.I went to Vegas for a week the day after I ordered it. When I got back home, it was at my P.O. Box. Easy enough.With a little help from YouTube, the trigger went right in. So easy a caveman (with YouTube) could do it.Haven't had any range time with it yet, but it feels AWESOME!!!! Sooo much better than the heavy, long, gritty, "multi" stage trigger that was on my AR.One thing to mention about this trigger, it's the same internals as the SSA-E, but with a flat bow. If you've ever thought that the conventional curved bow on your trigger felt "too close", you'll love the flat bow!I'll be doing more business with Primary Arms in the future!'Yotes beware!!!!

Great trigger, great service


I'm pretty new to primary arms, but since finding it, I'm having a hard time staying away. Thanks for the excellent service. As for the trigger, you cant go wrong with it, smooth, great break. 1st time straight trigger, nice feel.

Outstanding upgrade


It's the best trigger I've ever shot...well worth every penny!