Review: Apex Tactical’s Sig P320 Flat Trigger

While I was out at the range with Zack from XS Sights he let on that he had not only a P320 with him, but also had got his hands on a flat trigger from Apex Tactical. Zack was kind enough to loan me the trigger so I could evaluate it once I got my P320 in from Sig later that week, I couldn’t be more excited to find out if the benefits of installing the flat trigger are a reality.

Related: SIG P320 Selected as new US Army Handgun.

Apex says that the new P320 trigger increases the trigger reach for a more natural resting position of the trigger finger and allows the shooter to position their finger lower on the trigger to take advantage of increased leverage. The latter part of that claim fixes one of the shortcomings I found with the P320’s trigger, after shooting an honest 650 rounds with the factory curved trigger I found myself with a bit of a raw finger due to the bottom of the trigger protruding a bit more than necessary. 

Installing the flat trigger is pretty easy and only requires a pair of needle nose pliers (even though Apex says it is tool-less). The first step is to pop off the small coil spring on the lower left of the trigger pack, rotating it upwards and a bit of a push on it and it comes right off. IMG_2950 IMG_2953

Step two is to swing the trigger bar down and pull the trigger forward a bit, once the trigger has been rotated forward enough you can slide the trigger and trigger bar up and out of the channel in the trigger pack. IMG_2958 IMG_2959

Sliding the trigger and trigger bar back into the removable frame then reinstalling the trigger return spring completes the installation. The factory trigger was a bit on the short side with the medium grip for my tastes, but the new trigger is about perfect for my hands when using the medium frame. I found the flat trigger is much more comfortable to shoot thanks to the less pronounced protrusion at the bottom of the trigger.IMG_2984 IMG_2985

Between my friend Scott from The Gun Show Podcast (A great gun related podcast) and myself we put another 400 rounds or so downrange. Scott wanted to see if the trigger changed what groups we were getting and lined up at 7 yards, as you can see from the group they stayed about the same. The trigger pull and feel stayed the exact same as before, we noticed no change and verified with a trigger pull gauge.IMG_2991 IMG_3015

So what do I think about the Apex Tactical flat trigger for the P320? I really like it with the exception of the finish they used on the trigger, the smooth face didn’t quite offer enough grip with my sweaty hands thanks to the Texas heat. Both Scott and myself found that the new trigger really was comfortable when shooting fast but again, it was a bit slippery when our hands got the least bit sweaty.

If the flat trigger is something that interests you I would recommend that you give it a try. With a MSRP of only $44.95 directly from Apex there isn’t much reason to not buy one to run through the ringer. You can read more about the trigger on Apex’ site by clicking HERE.

Patrick R

Patrick is a Senior Writer for The Firearm Blog and TFBTV Host. He likes guns and has liked shooting guns for as long as he can remember. You can follow Patrick on Instagram @tfbpatrick, Facebook, or contact him by email at

The above post is my opinion and does not reflect the views of any company or organization.


  • You have to be very careful with that the trigger return spring, it can be very easy to bend it in such a way that it will affect function.

    • Patrick R. – Staff Writer

      I agree.

  • Slim934

    So how is the reliability of the P320? I remember hearing about some hiccups about the old P250, but really haven’t followed SIG for awhile so I’m not really if they ever fixed those issues (in either that pistol of the P320) or if those issues were really just bunk to begin with.

    • Matt Fulghum

      I’ve only got about 200 rounds through mine so far, but it’s been flawless. I haven’t tried running any _really_ crappy ammo through it yet, but UMC and Winchester bulk FMJs have been fine, along with a bunch of handloads I got from my dad.

    • Patrick R. – Staff Writer

      After about 1050 rounds I didn’t see a single malfunction. This was by far one of the most ammo intensive tests I have done, mostly because I wanted to keep shooting it.

    • Preface: I’m a member of Team SIG, so I am provided with a P320 for competition shooting. Take that however you want it.

      I have one P320 with 7,067 rounds through it with only one issue, where a bad case sent ruptured and sent my extractor into LEO (which was pretty exciting as I was shooting it in prone at the Bianchi practice range).

      I have another P320 which I also have a 40S&W slide for. It has 14,386 rounds of 9mm, and 5,696 rounds of 40S&W through it. It has had the occasional failure to fire due to a bad round of ammo, but nothing consistent. The only major issue was due to prototype action work that we were testing before it entered production, but that was fixed with the production version which has had no issues.

      • Jwedel1231

        27,149 rounds. That’s pretty substantial.

    • Joe

      I have had mine for about a year and a half and no malfunctions to date. I bought the compact, but EDC with the subcompact frame. IMO, I don’t see why anyone would buy a GLOCK over the P320.
      -better factory trigger
      -night sites come standard
      -modularity to swap sizes and calibers
      -100% reliable (thus far)
      -Bought it for $499 at my LGS

      Like I said, just my opinion, but I think SIG built a better mouse trap at a better price.

      • itsmefool

        Well, caliber swap capability among all but the .45 ACP version, but the well-versed among the Sig fans already know that; this comment is for the newbies here.

    • bjeremy

      I have the P320C in 9mm. I’d say I’ve got about 500 rounds through it so far without a single malfunction. Premium HP ammo, cheap bulk stuff…eats it all.

    • gltydg

      About 1,000 rounds through my FS 9mm P320. Zero issues!

  • itsmefool

    Just think…if only the FBI test 320s had this trigger!

    • Harry’s Holsters

      I’m hoping the Glock Gen 5 has a flat trigger. I doubt it though.

  • JOE

    Is the P320 legal for IDPA with this trigger?
    Is it legal for IPSA and USPSA PRODUCITON?

    • Only in ESP, CCP, and CDP.
      I assume you mean IPSC, if so both are a no.

      SIG will have the P320 Target that will feature a similar flat trigger on the market in the next few months. And under USPSA and IPSC rules you can use that same setup on other configurations. Though I am unsure if it will be available separately.

  • TheMaskedMan

    I’ve found that the flat trigger reduces the double-click annoyance when dry firing as well.

  • Harry’s Holsters

    I wish high production companies would start making flat triggers standard. I’ve shot a the agency and glock kraft and they both make a minor difference in my accuracy. This was from shooting a mag each. I’m sure with more practice I’d get even better.

    I think the flat trigger may be the way of the future.

  • Bill P

    Tried it. I saw zero reasons to switch and this is coming from a guy who Apex’s every single M&P. The flat trigger did nothing to change anything other than the leverage point and in doing so it made it hard to find the crease in my first digit. This resulted it me padding the trigger and pulling to my strong side. The only real advantage I see is that it looks cooler. 45$ can buy you 225 rounds of good factory ammo if you look around. Money better spent IMO.