I replaced my original P365 trigger return spring as preventative maintenance a year ago @ approximately 3600 rounds. The factory trigger pull was fantastic. I replaced it with the AC (IMSI) +10% spring because of the better spring material. After a year of shooting, I really did not like the extra pull and found my shots starting to pull left. Perhaps it is my worsening carpal tunnel, or perhaps it is the spring. Anyway, I did not like it but lived with it since I no longer trusted the Sig spring material.
I recently found that IMSI started making a "Minus 25%" trigger return spring for the P365. Ordered one from Rain Tactical, installed it, and off to the range. Trigger felt much better. Slightly lighter than the factory spring, but with the same good reset and reset "click". Shots have come back to POA/ POI for me. Approaching 4100 rounds through this little EDC and am very content.

 

So, what is the difference between the $4.99 TRS and the $7.99 spring offerings from The Sig Guy? The text describing each does not clarify the difference; at least for me it does not.

 

The $7.99 spring is the stock OEM Sig part installed at the factory and prone to failing over time. The $4.99 ones are aftermarket springs most likely made by ISMI out of a better quality spring material ( Chrome Silicon ). The better spring is the better deal.

 

It would be nice if there was a 3-piece (chrome silicone) Trigger Return Spring kit with a +10%, a stock pressure and a -20% pressure spring.

 

Thank you! This is good/important info to have. The unwise, to which group I Number, would assume the $7.99 spring was the one to buy. Au contraire?

 

I ordered both the Sig Guy +10% TRS and the one from Armory Craft (I got impatient and Sig Guy could deliver faster). Even with my fumble fingers, the install on the Sig Guy TRS was simple and ought to go smoother next time.

I'm wondering, though, will the Sig Guy or Armory Craft TRS last longer than the OEM spring?

Lee

 

i think you are right on what I saw, I am glad the forum is filling up with people that dig in deep and look at the facts. this gun should not need the type of care it is demanding.

 

Chill out with the posts Notlarry.

 

They're the same spring. All of the "+10%" P365 trigger return springs that AC, SG, etc are made by ISMI. SigGuy just doesn't list the manufacturer on his product page, as he likes to kinda rebrand all the parts he sells as "SigGuy" parts.

 

I do believe you are correct. It's odd that they are a little cheaper from Sig Guy than from ISMI.

FYI, Ross Cosat at ISMI is a fountain of knowledge regarding springs. He is a true gentleman and has graciously helped me more than once.

 

The ISMI springs are a darker color than stock trigger return springs.

Side by side you can tell the difference between the two springs.

 

Replacing the trigger bar return spring with an ISMI chrome silicon part seems prudent (and may eliminate the failures), but I have a question. Did you all choose a +10% because that was what was available at the time, or is there a reason why you wanted a stiffer spring than stock? ISMI makes a -10% spring (same materials) that should provide the same level of durability, with a slight decrease in trigger pull weight (instead of an increase).

 

Many of us prefer the more tactile reset and crisper break over a slightly reduced weight with a mushier break. My broken in P365 has 4 lb trigger pull. I personally don't want it striker fired CCW any lighter. My DA/SA carry (CZ P-01) has a 2.5lb SA pull, but it's 7lb in DA the way I carry it.

 

I.like mine the way it is.
Roger

 

wiht the talks about the trigger return spring rubbing on the module , does anyone have any idea if it still rubs as much in the aftermarket grip modules like Wilson or the any of the others.. I am gonna purchase some TRS to have but just wanted to see If anyone notices difference in wear on oem grip module vs aftermarket
and any real diff between the imsi vs armory craft springs wiht respect to longevity ?

 

I coated the TRS in lithium grease where it would make contact with the grip module and it did leave some grease in my Wilson Combat XL grip module at the contact point.