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Geissele Automatics G2S Two Stage AR-15 Trigger .154"

Manufactured by Geissele Automatics
MPN: 05-145
Manufactured by Geissele Automatics
107 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 G2S trigger is a cost effective alternative to the SSA or SSA-E that 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 curved trigger bow that helps to keep your finger in the same spot while pulling the trigger, allowing for better trigger control and accuracy. Not only does it work in 5.56 or .223 AR-15 rifles, but it works in .308 AR-10 pattern rifles. The G2S eliminates the laser markings and features a different hammer pin retention system to the more expensive triggers, as well as only being spot magnetic particle inspected.

  • 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 cost-effective option to the SSA-E trigger
  • Smooth two stage 4.25-4.75 lb. trigger pull
  • EDM wire cut from heavy duty tool steel
  • Great option for home defense and training at the range
  • Note: Trigger pull weights are approximate and may vary slightly between rifles.

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
ManufacturerGeissele Automatics
Trigger BowCurved
TypeTwo Stage
Weight6.4 Oz
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

107 reviews


Geissele Accurate Trigger Control


Absolute best trigger I have ever experienced. I was shooting very well with the QMS Trigger Group. I'm now shooting like an expert. Well worth the money.

Primary Arms #1


Awesome experience, would buy again.



Awesome trigger just like the ssa just cheaper will buy more and as always primary arms is the best

Great trigger for money


Bought one of these for a rifle I built for my son and liked it so much I had to buy another for my 223. I have an SSA and SSA-E in my 6.8 AR's and for the money this is a great trigger. Would recommend this trigger.

great trigger


coming off a stock M&P, I was hesitant at first to buy this trigger instead of spending the extra money on a more expensive one, I'm glad I pulled the trigger on it ;). It shrunk my group sizes and added a lot more enjoyment to the firearm. Going to end up costing me a lot more in ammo but it will be worth it. I highly recommend this trigger. Price is great yet breaks like a higher cost trigger. Works great for my needs



Crisp trigger. Very nice.

Great service trigger


Easy to install and while not as crisp as their more expensive models it makes a great service rifle alternative.

Great trigger


Excellent quality, smooth and easy release all at a reasonable price - what else could you ask for...

Smoking good trigger


For the money, the best 2-stage out there, IMHO.

Awesome triggers


Geissele triggers are incredible. This is my third one from Primary. They are expensive, but for a reason. I have been able to purchase mine when Primary has them on sale. Still high, but much better than full price. The G2S is the exact same as the SSA which will save you some money. Thanks Primary for all the great products and especially the great prices!