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Questions & Answers
Is this trigger compatible with an AR-15 carbine 300 Black Out 556/223? Expert Answer

No, this will not be compatible since it is the large pin version. You will need the small/standard pin version of this trigger which can be found here: https://www.opticsplanet.com/geissele-super-semi-automatic-enhanced-trigger-ssa-e.html

by Ethan, Gear Expert, October 23, 2024
Will this trigger be compatible in a left handed Stag-15 M4 model AR15? Expert Answer

The Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Trigger is only compatible with Colt rifles made from 1990 to 2009. You would need to use the small pin version, which can be found linked below:
https://www.opticsplanet.com/geissele-super-semi-automatic-enhanced-trigger-ssa-e.html

by Ethan, Gear Expert, March 13, 2023
Customer Reviews
Helpful Positive Review
Best all around trigger by Thanks, December 27, 2017
Amazing I have this and the SSA-E super dynamic! This one is waaaaay better than the super dynamic. The pull feels much lighter this one is crisp and light. After stage one it always surprises u it is so light. The dynamic u have to give it a bit mor...
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5/5 found this helpful
Helpful Positive Review
Best 2 stage trigger ever! by William Simmons, Verified Owner, March 24, 2024
I bought this one for my old Colt HBAR to spice it up some and boy did it. Anyone and everyone that shot it loved this trigger. So much so I ended up buying one for a new Daniel Defense M5. If you’re looking for a two stage trigger don’t wast your ti...
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1/1 found this helpful
Helpful Positive Review
Geissele SSA-E large pin by Adolfo S, February 10, 2021
So glad Geissele makes these for the older Colt preban AR15. Very easy to install. Although, I have not fired it yet, the pull and reset are night and day compared to the stock trigger after executing a function test.
1/1 found this helpful
Helpful Positive Review
Awesome! Worth the extra $ by PR, Verified Owner, December 10, 2020
I have an early 90s Colt HBAR Sporter. I had worked on the original trigger group and helped it but it was still bad. Wasn’t crazy about grinding or killing sear block out. Found this Geissele that was supposed tomfit with no modifications. Wow! It ...
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1/1 found this helpful
Most Recent Reviews
Did not function on my sig spear lt by Dave, Verified Owner, December 16, 2024
For whatever reason this trigger did not function on my SIGs spear Lt. I have many geissele tiggers in the past. Will be sending this one back hopefully it’s just a fluke.
Most Recent Reviews
Happy customer by Scott Castner, Verified Owner, February 28, 2024
was very happy with this trigger, was easy to install
Read All 10 Reviews

Huge Black Friday Savings on All Geissele Products

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Color: Black Trigger Shape: Curved Trigger Pull Weight: 2.9 - 3.8 lbTrigger Pin Size: Large Hand: Ambidextrous Gun Make: AR Platform Gun Model: AR-15 Condition: New

Code: 1TO-ART-05-171-EE

MPN: 05-171

UPC: 854014005625

Blazin' Deal
List: $305.00Save 32%
$205.88

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Large Pin Trigger

Finely-tuned semi-automatic-only version of our full-auto, two stage combat trigger presently used in the U.S. Special Operations Community. The large pin dimension is 0.169 inches, whereas the standard pin dimension is 0.155 inches. Built on the chassis of the Geissele SSA, the Super Semi-Automatic Enhanced (SSA-E) provides enhanced trigger control and weapon accuracy while maintaining the robustness and reliability of our combat-proven two-stage trigger. The SSA-E's reduced first and second stage pull weights result in a trigger with a smooth, light first stage take-up and a crisp, candy cane-like second stage break. The SSA-E is ideal for use in precision Squad Designated Marksman type rifles where weapon accuracy and reliability are critical and a non-adjustable drop in trigger is desired.image

Please note, our triggers are designed for mil-spec AR15/M4 carbine rifles. Our AR15 triggers are not compatible with the Sig MPX/MCX weapons or Pistol Caliber Carbine AR15/M4 variants. Using them in these platforms will void the warranty.

Large pin version of the Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger for use in Colt AR rifles manufactured from 1990 to 2009.

WARNING: California`s Proposition 65

Specifications for Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Large Pin Trigger:

Manufacturer: Geissele
Color: Black
Trigger Shape: Curved
Trigger Pull Weight: 2.9 - 3.8 lb
Trigger Pin Size: Large
Hand: Ambidextrous
Gun Make: AR Platform
Gun Model: AR-15
Gun Type: Rifle
Condition: New
Country of Origin: USA

Package Contents:

  • Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Large Pin Trigger

Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Large Pin Trigger Orderable Models

List of Orderable Models

  • Geissele Super Semi-Automatic Enhanced Large Pin Trigger, AR-15, 2.9-3.8 lb, Black, 05-171 , MPN: 05-171 , UPC: 854014005625 , Code: 1TO-ART-05-171-EE

Geissele AR-15 Super Semi-Automatic Enhanced (SSA-E) Large Pin Trigger Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Geissele Super Semi-Automatic Enhanced Large Pin Trigger, AR-15, 2.9-3.8 lb, Black, 05-171 , MPN: 05-171-DEMO , Code: 1TO-ART-05-171-DEMO
  • USED Geissele Super Semi-Automatic Enhanced Large Pin Trigger, AR-15, 2.9-3.8 lb, Black, 05-171, EDEMO8, Used, Condition Fair , MPN: 05-171-EDEMO8 , Code: 1TO-ART-05-171-EE-EDEMO8
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