Sig trigger

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Sig Sauer Pistol Triggers Reviews

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Flat and Curved Advanced Trigger for Sig P320

Forward Set Trigger Kit for Sig P320

Forward Set Trigger Kit for Sig P320

As low as$49.95

Availability:In stock

Only %1 left


The Apex Flat and Curved Advanced Triggers reduce trigger pull weight up to 35% in the Sig P320 factory upgraded models. When properly installed, this trigger will:

– Reduce trigger pull weight by approx. 35%

– In X-Series models, reduces pull weight by approx. 10% and reduces overall travel 15%

– Maintain factory drop safety values

For Use In These Guns

For use in the Sig Sauer P320 pistols (with factory safety upgrade), including the X-Series models.

Does Not Fit These Guns

Not for use in non-factory upgraded P320 pistols.

Does NOT function in the Sig Sauer P250.

What's Included

1 ea. Flat or Curved Advanced Trigger


Products to Consider

One more step...

Please review and accept our Pre-Order Policy.

APEX Preorder Policy

Placing a preorder allows you to "get in line" and reserve your product: the quickest way to acquire an out of stock item.

Preorders are charged when the order is placed and shipped as soon as the product is available. Our regular return policy applies, with the 60 day return policy starting from shipment date.  See our Policies page for full details here

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If you have a Sig P320 and you’re looking to upgrade the trigger, you will most likely compare the Sig P320 flat trigger vs Apex.

Apex Tactical is a company that got its start doing custom pistol work and is most well-known for its Smith and Wesson M&P triggers. 

Sig P320 Flat Trigger vs Apex front faces of triggers

They were the first company to make an aftermarket trigger for the Smith and Wesson M&P. At a time when the Smith and Wesson M&P had a horrible factory trigger. An aftermarket trigger was considered a necessity. 

When the Sig P320 was introduced, it did not have an option for a flat trigger. 

Now Sig is shipping multiple models with their flat trigger. If you have a Sig P320 without a flat trigger, you can upgrade to the flat trigger. You can buy the trigger directly from Sig. We will compare the Sig P320 flat trigger vs Apex flat trigger and see how they stack up.

Trigger Shoe Shape

Both of these triggers have some similarities. The most significant similarity is going to be the angle at which they sit. Both of the triggers will sweep somewhat forward. They sit at a similar position in the gun. These triggers have the same length of pull from the back of the Sig P320 grip. The width of the trigger shoes is also very similar. That, though, is where the similarities end.

Sig Flat-Faced Trigger Shoe

The Sig P320 flat trigger looks a lot fatter if you look at the trigger shoe from the side. 

It extends more towards the back of the gun. Even though this area behind it is hollowed out, it does make the trigger look much more substantial.

It does change the feel of the trigger on your finger and how your finger contacts the trigger face. The edges of the trigger are rounded, but there’s still a little bit of a sharp feel to it. 

Sig P320 Flat Trigger vs Apex Sig Trigger Front Face

For myself, this is not an issue as the middle of my trigger finger impacts ideally in the middle of the trigger shoe. If you have shorter or longer fingers, you might find those edges a little uncomfortable. 

There’s also a hook at the very bottom of the trigger shoe. This hook is very slight, and it’s not going to cause any discomfort like some designs may for people with larger hands. The way my trigger finger impacts the trigger’s face doesn’t touch the hook.

Apex Flat-Faced Trigger Shoe

The trigger shoe on the Apex trigger is much narrower. When you look at it from the side, you’ll see that it’s much thinner. It also has much more rounding on the edges of the trigger shoe itself. So, if you have larger hands that will end up placing the pad of your finger more to the side of the trigger. 

This trigger may be slightly more comfortable than the trigger shoe on the Sig. 

Sig P320 Flat Trigger vs Apex Apex Front Front Angle

Another thing to mention is the hook at the bottom. This hook extends further up the Apex trigger than it does on the Sig trigger. For myself, I can feel it. It makes the trigger feel like it’s not so much of a flat-faced trigger. Instead, it’s more like a curved trigger. It doesn’t bother me, but it’s not something I love either. 

I prefer the shape of the Sig P320 flat trigger vs Apex.

Trigger Takeup

Taking up will be a factor that many people are going to care about. Many people like a very short take-up. Others prefer a mushier take-up that gives them a little more margin for error.


The take-up on the Sig P320 is very minimal. 

You’re going to fill it right as you come into place with the trigger. It’s only around a 10th of an inch or less. There isn’t much there.


The trigger take-up on the Sig P320 Apex trigger is even slighter than the Sig P320 factory trigger. This take-up is minimal, maybe around half of a 10th of an inch. I know this seems like very little. It is, and once you get there, you’re going to feel a rigid wall once you get through that slight bit of take-up.

Trigger Break

The trigger break on this is where you’re going to start noticing the difference between these two designs. 


Once you’ve taken out the take-up on the Sig P320 flat-faced trigger, you’re going to start to feel just the slightest bit of creep.

Sig P320 Flat Trigger vs Apex Sig Trigger Hook Side

Then it’s going to move into a rolling break. This break is very slight. If you pull the trigger slowly, you’ll feel the creep, but at the same time, it has a nice rolling break. I’m a big fan of a rolling trigger break. So I like the way the Sig P320 trigger feels.


On the Apex, you’re also going to feel a little bit of creep in the trigger.

You’re going to feel far less creep than you do with the stock Sig P320 trigger. The Apex trigger has almost no creep when you go into a hard wall. 

Sig P320 Flat Trigger vs Apex Apex Trigger

Once you fill that wall, the trigger almost immediately breaks. It snaps like a carrot. It’s not quite a glass break, but it is a carrot break. 

There is a solid wall in this Apex Sig P320 flat-faced trigger.


The resets on these triggers are also going to be quite a bit different. You’re going to notice the most significant difference between these triggers regarding the trigger break and the reset. 


On the Sig P320 factory flat-faced trigger, you’re going to feel a very mushy reset. 

The trigger itself resets slightly into the take-up zone. Again, it resets right in front of the portion you’re going to feel right after the take-up.


Your reset is going to be almost the same position as the Sig factory trigger.

The only difference it’s going to feel much more authoritative. These triggers have a very soft reset, but the Apex fills more definite when it resets. 

You’re going to hear an excellent solid click on the Apex. You’ll also hear that click on the Sig, but it won’t feel as positive as it does on the Apex trigger.


Both of these triggers retail, right at $50. 

If you have one of the Sig models that includes a flat face trigger, you’re going to have to pay an extra $50 for the Apex. 

At the end of the day price, isn’t going to make a difference in which trigger you’ll buy or installing in the gun unless your gun already has a factory Sig flat-face trigger. For myself, I don’t see the extra money as being worth it. 

Final Thoughts

I prefer the Sig trigger’s rolling break, while my buddy Michael of Lynx Defense likes the more definitive characteristics of the Apex trigger. 

Sig P320 Flat Trigger vs Apex Rear of Triggers

If you prefer a rolling brake, get the Sig P320 flat-face trigger. Whereas if you prefer a decisive break, buy the Apex. Both of these are good triggers.

I don’t think you’ll go wrong with either one, but don’t expect a 1911 quality trigger out of either of these.

Like this:


CUSTOM 1911 QUALITY TRIGGER: SIG ARMORER Competition Level Trigger Job for the Sig Sauer P320!!

Lawsuit: Sig Sauer pistol fired without trigger pull

Sig Sauer has corporate headquarters and a production facility in Newington, New Hampshire, at Pease International Tradeport. A New Hampshire man is suing the company, alleging its P320 pistol fired without a trigger pull, causing him permanent physical damage.

NEWINGTON - A Hillsboro man is suing Newington gunmaker Sig Sauer alleging his Sig P320 pistol fired, without him pulling the trigger, causing a bullet to be discharged into his thigh.

Kyle Guay’s six-count federal lawsuit mirrors claims from across the country and seeks double or triple damages for his injuries and loss of employment. He’s also asking a judge to order Sig Sauer to recall all P320 pistols, with a warning to owners that, “the weapon can fire without a trigger pull.”

“This is a dangerously defective gun that has already seriously injured many people, including Mr. Guay and law enforcement and other civilians,” said attorney Benjamin King, who is local counsel with CT attorney Jeffrey Bagnell. “Because Sig Sauer failed to correct design defects, the P320 stands to injure others. We hope this lawsuit sheds light on that danger.”

King said the suit was filed Thursday in the U. S. District Court of New Hampshire, service has not yet been made to a Sig Sauer representative and he doesn’t know which lawyer will represent Sig. The Herald left a message seeking comment from Sig Sauer and if that message is returned, this story will be updated.

Sig Sauer in 2017 announced a “voluntary upgrade“ for that pistol while reporting it could discharge a round when dropped. The M17 variant of the P320, selected by the U.S. government for the Army in a $580 million deal, was not affected by the voluntary upgrade, Sig announced at that time.

King said Monday the position of his client is that there “should be a mandatory recall” of the P320s sold to commercial customers.

In Guay’s lawsuit, he alleges he was removing his outside-the-waistband Sig Sauer holster, in which his Sig P320 was secured, “when the pistol fired and hit him in the right thigh without him ever touching the trigger.”

“The hollow point bullet it discharged left a gaping wound in his thigh, caused nerve damage, and left pieces of the blown apart holster across the floor” on Jan. 28, according to the suit.

Hillsboro police responded, noted “historical problems” with that pistol and determined the gun went off inside the holster, the lawsuit claims. Police determined there was no reason to believe Guay, 32, who has “substantial firearms experience,” intentionally or negligently fired the pistol, the suit alleges.

He has suffered severe, permanent and disfiguring injuries, according to the suit. Guay’s suit also includes a list of alleged incidents when a Sig P320 fired without a trigger pull, many by law enforcement officers.He includes a transcript from a bodycam recording of Roscommon, Michigan officers when one of them was getting out of a car and his holstered P320 fired.

“While and most likely before competing for the $580,000,000 Army contract in 2016 and 2017, Sig privately struggled, unsuccessfully, to find an engineering re-design solution that would prevent the commercial version of the P320 from unintentionally firing on civilians and law enforcement officers without trigger pulls, even upon mere rotational movement of the human body,“ Guay’s suit claims.

In August 2017, a Stamford, Connecticut, SWAT officer sued Sig after his holstered pistol fell and discharged a bullet into his knee, Guay alleges. Four days later, Sig “issued a press release stating that the P320 could fire without a trigger pull under certain conditions, including vibration, but “reaffirmed” the safety of the P320 to all end users,“ it’s alleged.

That was followed by the voluntary upgrade program, which Guay alleges, was used by 20% of P320 owners, “ leaving hundreds of thousands of dangerous P320s still in circulation in the United States.”

Guay’s federal lawsuit alleges counts of Violation of the Magnuson-Moss Warranty Act, negligence, breach of warranty, intentional infliction of emotional distress, negligent infliction of emotional distress and Violation of New Hampshire Revised Statutes.

He’s asking the federal court for his case to be heard by a jury.

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Trigger sig

SIG P-Series Dual Adjustable Straight Trigger


The SIG P-Series Dual Adjustable Straight Trigger is the straight-faced version of our legendary curvedP-Series Dual Adjustable Trigger. This premium aftermarket trigger includes over travel and pre-travel adjustability. (Adjustable for double action slack and single action over travel.)

The optimized trigger face pressure-wall angle provides for outstanding single action sear release and positive, ultra-fast reset control. The ergonomics provides superior double action leverage and control.

Dual Adjustable Straight Trigger Details

This steel trigger is carefully heat treated and finished in black oxide, Nickel Teflon PTFE, PVD or Titanium nitride (TiN) Gold. Tight pin hole tolerances assure smooth, solid function. Guaranteed for life against defects in materials or workmanship.

Made with love, supplied with a hex key.

The trigger weight is about .83 ounces (23.45 grams)


Black Oxide

Titanium Nitride (TiN)

A well-proven standard layer type through its balanced properties. The golden titanium nitride layer, abbreviated TiN, indicates the following properties:

  • High hardness and adhesion
  • Good chemical resistance
  • Good temperature resistance in air
  • Relatively low thermal conductivity
  • Attractive, golden color

Physical Vapor Deposition (PVD)

This state-of-the-art process creates a molecular bond to the trigger, resulting in a very durable finish. The PVD finish should not corrode, discolor or tarnish.

Nickel PTFE

Electroless Nickel PTFE (Teflon®) is an advanced, self-lubricating, composite coating that has PTFE particles co-deposited in the electroless nickel layer. Provides for a hard, uniform, self-lubricating coating for our premium aftermarket triggers.

Fit Guide

The trigger is designed to fit both current and older model traditional double action (DA/SA/decocker) P-Series pistols, including

  • X5 All-Round
  • P220 (see exceptions below)
  • P226
  • P228
  • P229
  • P227 and others

These triggers are approximately 10mm wide. At this time, we are not suggesting this trigger for guns equipped with the DAK trigger system.

This trigger may not be fully compatible with California compliant or similar P-series pistol models equipped with a magazine disconnector, and Grayguns urges caution. We do not recommend deactivating any mechanical safety device.

The Grayguns DA/SA triggers will not fit SIG Pro, P225 / P6, P239, West German P220s, or most SAO models. Most of these triggers are a narrower 8mm width.

If you’re looking for the single action only (SAO) version of this trigger, check out the P-Series SAO Dual Adjustable Straight Trigger.


These parts are intended for installation by a qualified armourer or gunsmith. In some cases professional fitting will be required by a trained, qualified armorer/gunsmith who is very familiar with the pistol’s action. This is due to the varying tolerances present in all mass-produced firearms. Although kits fit with no issues in a great majority of pistols, Grayguns is unable to guaranty perfect functionality in every instance. Grayguns does offer installation services for all parts kits we offer.

Additional information


Black Oxide, Dual Adjustable Straight Trigger (SAO with Pin), Dual Adjustable Straight Trigger (SAO without Pin), Nickel Teflon, TiN Gold, PVD Blue, PVD Coyote

Sig P320 Agency trigger, a big nope?!

Sig Sauer P320 Trigger (Presale is Live)

Experience the latest innovations for the Sig Sauer P320 with our aftermarket drop-in Sig P320 trigger! With this trigger at your disposal you will experience a 10% less travel for engagement over the OEM Sig trigger as well as more consistent and accurate groupings.  This high performing trigger for the Sig Sauer P320 line is equipped with a two-piece construction of stainless steel and 7000 series aluminum that functions with your OEM internals ( i.e. Fire Control Unit). This combination of robust features allows the Tyrant P320 trigger to offer the ergonomics and aesthetics of a full bodied trigger WITHOUT the added weight, making it a versatile tool with a greater performance over its competitors.  

Less Travel from shot to shot

Try a quick fire drill at any time with our Sig Sauer P320 trigger and experience the 10% less travel over OEM! Less travel equals less time between shots and overall a faster more efficient shooting experience. 

Optimize every shot you take with the precision, efficiency, and durability of the Tyrant P320 trigger. 

Flat Faced Trigger Features

Get the most out of your Tyrant made Sig Sauer P320 trigger with this flat face model. The Tyrant Designs CNC P320 trigger offers a flat face with an aggressive curve at the bottom, offering a consistent finger placement for the operator. Perform consistent and reliable groupings with each shot when using our version of the Sig trigger. 

High Durability

Enjoy your Tyrant Designs CNC Sig Sauer P320 trigger for years to come with help from its highly durable design. Every feature of this product is built to ensure that it lasts for an extended period of time, even with continued use. With its two-piece steel/aluminum construction you can enjoy the reliability and strength for years to come, especially with our lifetime factory warranty*. 


Steel and aluminum construction.

10% less travel for engagement.

Functions with stock internals. 

Fitment: *

Sig Sauer P320 variants 


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