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Questions & Answers
Mpx already comes with a Timney in it so why replace it with another Timney that’s apparently the exact same thing ?

First version of the SIG MPX did not have the Timney trigger.

by Frank, Verified Owner, January 17, 2025
Does this trigger come with the protective end cap where the hammer hits the assembly? It is not shown in any of the pictures. Expert Answer

No. The Timney Triggers SIG MPX Single Stage Drop-In Trigger will include the trigger, and Allen key, and a shim. It is everything that is needed in order to install. You can re-use your hammer/trigger pins as well as safety.

by Ethan, Gear Expert, March 2, 2022
Customer Reviews
Helpful Positive Review
The stock trigger in the MPX is typical mil spec product. The Timney trigger upgrade is the only thing I've done to my MPX and I am very happy with the results. It's very easy to install, even for a novice like me.
1/2 found this helpful
Helpful Positive Review
Easy install, perfect fit by Jason, 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 fa...
Read More...
3/4 found this helpful
Helpful Positive Review
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.
7/8 found this helpful
Helpful Positive Review
Copperhead trigger by David Hoffman, Verified Owner, May 9, 2020
The stock trigger on the Sig Copperhead is definitely one of those areas ready for improvement. This Timney Trigger is just the thing for that. It shipped fast and installed even faster. I have some experience with AR style triggers so the installati...
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1/1 found this helpful
Helpful Negative Review
Good Trigger, Terrible Instructions by Zipp0, Verified Owner, May 27, 2023
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 orient...
Read More...
2/2 found this helpful
Most Recent Reviews
Great trigger, moderately easy install by Cris, Verified Owner, 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...
Read More...
Read All 21 Reviews

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Color: Black Trigger Shape: Tactical Flat Trigger Pull Weight: 4.5 lbGun Make: SIG Sauer Gun Model: SIG Sauer MPX Condition: New

Code: 2AN-TGR-MPXST-683

MPN: 683

UPC: 081950683000

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List: $267.99Save 10%
$242.49

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 Timney Triggers SIG MPX Straight Trigger

The Timney replacement trigger for the Sig Sauer MPX is the latest in the Timney lineage of semi-automatic, replacement triggers. Timney collaborated directly with SIG on the design and features of the MPX drop in replacement trigger.image

The trigger, hammer, and bridge are constructed of heat-treated steel. The housing is machined from 6061 T6 anodized alloy and the trigger is heat treated steel and coated with black oxide.

The trigger is single stage and features a straight blade. The Timney replacement trigger for the SIG MPX is a self-contained, 100% drop-in trigger ready to install in your rifle for an exceptionally smooth, crisp, trigger pull with no gunsmithing, fitting, or adjusting required.

The MPX replacement from Timney features a hardened steel bridge to protect the trigger components from the vigorous bolt blow back characteristics prominent in Pistol Caliber Carbines.

The single stage trigger features a non adjustable trigger pull weight of 4.5 pounds. Drop in installation is simple once the Factory trigger is removed, you will reuse the factory Hammer and Trigger pins.

Set screws are located in the housing to lock the trigger in place and prevent the pins from walking out of place.

The Timney drop in MPX trigger works with the factory safety as well as many aftermarket replacements, especially the Timney 49r ambidextrous, short throw safety available here on the website.

AR Safety Selector

Specifications for Timney Triggers SIG MPX Straight Trigger:

Manufacturer: Timney Triggers
Color: Black
Finish: Black
Fabric/Material: Heat Treated Steel
Trigger Shape: Tactical Flat
Trigger Pull Weight: 4.5 lb
Gun Make: SIG Sauer
Gun Model: SIG Sauer MPX
Condition: New
Last Chance: Yes
Country of Origin: USA

Features of Timney Triggers SIG MPX Straight Trigger:

  • This Trigger Works With These Rifles: SIG MPX

Package Contents:

  • Timney Triggers SIG MPX Straight Trigger

Timney Triggers SIG MPX Straight Trigger Orderable Models

List of Orderable Models

  • Timney Triggers SIG MPX Straight Trigger, 4.5lb Pull Weight, Black, 683 , MPN: 683 , UPC: 081950683000 , Code: 2AN-TGR-MPXST-683

Timney Triggers SIG MPX Straight Trigger Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Timney Triggers SIG MPX Straight Trigger, 4.5lb Pull Weight, Black, 683 , MPN: 683-DEMO , Code: 2AN-TGR-MPXST-683-DEMO
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