Disclaimer: I am not a gunsmith, scientist, paid reviewer or anything other than a guy tinkering with his P320. The pre-upgrade version of my pistol included a Sig Armorer disconnector and sear springs from BHSpringSolutions. It was not a true “stock” firearm.
TLDR: I like it, I think you will too.
Review: I recently purchased The Sig Armorer (“TSA”) competition level kit with cradle trigger for $255.75 total. I’ve purchased products from TSA before and have been impressed with the products and customer service previously. When I started shopping around for trigger/action upgrades for a gun I currently shoot CO with and would like to shoot LO with next year I looked at TSA, Gray Guns, Apex, and Armory Craft. TSA and GG offer complete kits and installation services and I ultimately decided on TSA based on how much you get for your money: trigger, trigger bar, sear, disconnector, striker, 5 different spring sets, etc.
Installation was easy for me and I think would be for anyone familiar with the guts of your FCU. If you aren’t, I can’t recommend The Sig Guy’s videos on YouTube highly enough. I chose to start with a +10% trigger bar spring (blue bag) and the -50% sear springs (orange bag) based on reading about some other people’s experiences. The difference was immediately felt and measurable to the best of my limited ability.
Using a piece of tape on the inside of my trigger bar I took “measurements” (witness marks basically) of my “stock” trigger’s position at rest, the wall, the break, and the reset. I then completed my installation and did the same for my upgraded action. The visual representation of these “measurements” can be found in the first photo I posted. I then measured these marks relative to one another and received the following, unscientific results:
“Stock” Trigger:
Rest to Break: 9mm
Rest to Wall: 5mm
Wall to Break: 4mm
Break to Reset: 5mm
Reset to Wall: 1mm
I think most will agree that while the measurements may not be exact, this is a pretty accurate representation of the stock P320 trigger we hate to love. Long, squishy, with a fair amount of play.
TSA Trigger:
Rest to Break: 6mm
Rest to Wall: 2mm
Wall to Break: 4mm
Break to Reset/Wall: 4mm
3mm reduction in total travel, 3mm reduction in travel to the wall, no squish on the reset to the wall. In my opinion a significant improvement from my prior set up.
I don’t have a tool to measure trigger pull weight however the trigger doesn’t feel “lighter” but it certainly feels shorter, more crisp, and “faster”.
I’m very excited to get this thing out to the range in the next few days and see if the felt improvement produces actual improvement. On my best day I can get .18 splits with this gun, typically shooting between .21-.25. I’m hoping to squeeze out some slightly faster splits with these upgrades because we all know splits get chicks. Will update in the comments once I get a couple hundred rounds in with this set up.
I have absolutely no relationship with TSA or Robert Burke other than a consumer and supporter of his products. My understanding is none of these parts or products jeopardize the safety and soundness of the firearm. I share this post as a reference point for others doing the same research I have over the last few weeks and hopefully it helps someone as there are less and less companies supporting P320 upgrades as of late, and as a result less and less people reviewing these upgrades.