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Geissele MPX M4 Rifle Trigger
$386.60 $360.00
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Most Helpful Positive Review great mo trigger!
This trigger is a fast improvement over the stock factory trigger (non timney trigger). The added recoil springs of different strengths is nice, especially if you plan to shoot suppressed. I coupled mine with a radian safety.
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Great trigger

by Screaming.Reels.556, Verified Owner from UT, United States Written on September 9, 2026
The Sig MPX is a trigger killer. I have a gen 2 MPX and mine has broke the original trigger, a Hyperfire trigger, a standard milspec trigger, the TriggerTech MPX specific trigger. All have failed at varying round counts. I am starting to wonder if any trigger can handle the MPX. I have always like Geissele triggers but the price of the Geissele MPX is a bit much, especially when contemplating if it will be another failure. I was able to get a good deal on it and made the purchase.

First impressions is that it is a very well built trigger, and feel much sturdier than any of the others I have used. I currently have just over 900 rounds, suppressed, and there has been no issues. Hopefully it hold up to the abuses.
Pros:
  • well built
Cons:
  • Expensive
Would recommend: Yes
Was it helpful to you? Yes | No

Works well. great inclusion with springs

by Albert M, Verified Owner from AL, United States Written on August 26, 2026
Watched a quick video for the install and was able to get it done without a hitch. The trigger comes complete and includes 3 levels of springs to tune the MPX. The yellow set worked fine for me. You do need to test to ensure you get proper cycling and extraction. I can’t compare to the Timney as mine was a purchase through the NEX where the 8 inch barrel is available. OP as always was phenomenal to deal with. That’s why I look here first for my fun stuff.
Pros:
  • comes with 3 sets of springs
Cons:
  • none for me
Would recommend: Yes
Was it helpful to you? Yes | No

Absolutely worth it

by John, Verified Owner from NV, United States Written on March 3, 2026
Great product and love that it comes with springs. This is a must for an MPX
Would recommend: Yes
Was it helpful to you? Yes | No

excellent trigger

by Robert, Verified Owner from NC, United States Written on July 17, 2024
The Geissele trigger comes complete with BCG springs to slow down the rate force that causes tear and wear on the trigger. Smooth brake, easy installation, overall very happy with my purchase
Would recommend: Yes
1 of 1 found the following review helpful.
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Last updated 2025-11-12 UTC.