P320 Flat Trigger is rated 4.8 out of 5 by 153 .

Rated 5 out of 5 by Radar75 from The final piece of the puzzle 4 months ago i had a choice between a m17 and an x5. I chose the m17 because I am in the back country a lot and the holes in the slide didn’t seem like a good idea with all the dust and dirt it would be seeing. So I decided to put the sigs modularity to the test. What I ended up with could easiest be described as an xm517. Got the final piece today because the triggers were out of stock for a long while, but it was def worth the wait. Absolutely love this trigger shoe. Being able to get lower on the trigger really helps to lower the perceived weight of the trigger pull and was what the pistol really needed.

Rated 5 out of 5 by Jim M. from Sig flat face trigger in my P320 subcompact I'm extremely happy with my new Sig flat face trigger. It reduces the weight of trigger pull somewhat, due to its configuration and my ability to pull from the bottom of the trigger, and it helps me tighten my groups by helping me pull the trigger straight to the rear and more smoothly and consistently than with the stock curved trigger (which was great, but this one is just much better). I installed it myself, and installation is simple and straight forward.... until you get to the part where you have to reconnect the trigger spring... very awkward and a real challenge. I couldn't accomplish it with my bare fingers and had to finally enlist the aid of long nose pliers.

Rated 5 out of 5 by Dave Frank from Nice Trigger Upgrade Decided to swap out to a flat trigger since I have bigger hands and my finger was getting beat up with the curved stock trigger on the M18. What a difference it makes! Took a little adjusting at the range but found I'm keeping tighter grouping on follow up shots. There are plenty of YouTube videos showing how to install triggers so it only took 5 minutes to do the swap. Make sure you have a pair of smaller needle nose pliers because it will make life much easier.

Rated 5 out of 5 by 12Bravo from Excellent Option for P-320 Pistols The flat trigger not only looks good on the pistol, with a little patience it is easy to self-install. I noticed a marked improvement in shot-grouping over the standard curved trigger, to include a slight improvement in feeling/locating the trigger re-set in rapid firing. Please bare-in-mind the flat trigger is not a cure-all for marksmanship. Trigger discipline and control, as well as hand-grip and sight picture is still required for accurate shooting. For intermediate and expert shooters I believe you will find the flat trigger to be a good choice for improving your shot grouping. I liked it so much that I put flat triggers on all three of my P-320's.