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Timney Triggers SIG MPX Straight Trigger
$267.99 $258.49 Save $9.50
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Most Helpful Positive Review Has to have anti walk pins to properly install
Trigger has a great feel and break. But...you have to buy anti walk pins to properly install. Trigger pins walk. If you tighten the screws designed to prevent this, the trigger body rises against the safety selector switch and it won’t operate.
Most Helpful Negative Review Good Trigger, Terrible Instructions
The included instructions make no mention of the base plate that you need to install under the trigger to protect your receiver from damage by the set screws. Also, there is zero mention of the trigger bridge that must be installed and must be oriented properly. I did find updated instructions onlin...
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Great trigger, moderately easy install

by Cris, Verified Owner from FL, United States Written on July 13, 2025
This trigger 100% fits in the Sig MPX which I had had the unfortunate luck of purchasing other triggers that did not work. It's quick and easy to install if you have the right tools, the time, and the instructions. Although the instructions that came with the trigger are not extremely detailed, it still gave enough to guide me to installing it with only one minor issue (my error, not the instructions or the trigger). I recommend this is probably the best trigger out there. Smooth, easy to pull, and overall a great upgrade to an already great gun.
Would recommend: Yes
Was it helpful to you? Yes | No

Excellent trigger

by MB, Verified Owner from CA, United States Written on January 31, 2025
The trigger was crisp and quick return of engagement. I would highly recommend this trigger for any MPX rifles.
Would recommend: Yes
Was it helpful to you? Yes | No

works like a charm

by king, Verified Owner from NH, United States Written on October 27, 2024
Had a defective one from sig it self, but it seems like the one i got is locked into place and been abused no signs of breakage as of just yet.
Would recommend: Yes
Was it helpful to you? Yes | No

Easy installition and disregard walk out pins.

by Hammer, Verified Owner from NC, United States Written on July 18, 2024
This is my first time putting in a drop in trigger. While the directions were handy, YouTube it for play by play instructions for those that need a visual reference like me. Only issue I ran into was finding a punch that was small enough to knock the roll pin out for the ambi safety.

As far as the reviews on the pins walking out I feel like people aren’t willing to tighten the screws down all the way. The springs are kind of in the way to access the Allen screw ports and you will need to use a small flathead to move them out of the way. Very, very simplistic. I would recommend anyone with an MPX that is a novice, like myself, to upgrade the trigger before literally anything else on this platform.
Would recommend: Yes
Was it helpful to you? Yes | No

Purchased for replacement of terrible trigger pull

by JEB, Verified Owner from AL, United States Written on May 28, 2024
Sig MPX Copperhead has not been shot after installing, but reduced trigger pull and reset is crisp and short: Pull weight dropped from 9.9 lbs to 4.3 lbs and not oiled .
Would recommend: Yes
Was it helpful to you? Yes | No

Great trigger.

by Zaddy, from MA, United States Written on February 18, 2024
Over all its a great trigger, but the instructions to install it were very vague. If you know a think or two about AR platform you should be fine.
Pros:
  • Crisp & clean break when firing
Cons:
  • Instalation
  • Bad instructions
Best Used for:
  • rifle
Would recommend: Yes
Was it helpful to you? Yes | No

MPX Timney Trigger

by Tony, Verified Owner from FL, United States Written on January 30, 2024
Ordered one for my MPX. Light years better than the standard trigger that SIG provided with the MPX. Has my gunsmith install although in retrospect it would be an easy do-it-yourself job. Crisp and smooth.
Would recommend: Yes
Was it helpful to you? Yes | No

Solid trigger - get anti walk pins

by Mors tyrannis, Verified Owner from OH, United States Written on December 22, 2023
This is in my mpx k and it's titties but the pins didn't stay and needed to wait to use until I had anti walk pins installed
Pros:
  • Works 10/10
Cons:
  • Needed a part
Would recommend: Yes
Was it helpful to you? Yes | No

Great single stage trigger

by Rhood306, from TX, United States Written on August 10, 2021
I love this trigger. It made my MPX shootable and a great great option to shoot again. The stock trigger for the MPX hard and effected my on target aim. This trigger made shooting the mpx fun again. I found the new Timney trigger to be smooth And easy to install
Pros:
  • Easy to install, smooth, great pull weight
Cons:
  • Want a 2 stage option
Would recommend: Yes
Was it helpful to you? Yes | No

Easy install, perfect fit

by Jason, from MO, United States Written on September 2, 2020
Put this trigger in my Sig Copperhead, pulled out old trigger, dropped this one in, put in the pins and tightened two screws, that’s it, 3.5lbs. I would recommend putting these in all guns they will fit. I read a review from a guy saying the pins fall out, yes they will until you tighten the screws that are in the trigger box, they put tension on the pins and I had no issues
Pros:
  • EASY INSTALL
Cons:
  • None except price but worth it
Would recommend: Yes
3 of 4 found the following review helpful.
Was it helpful to you? Yes | No
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