Originally Posted by OldLefty

I bought the M2 4" with TS and OR before I found a 3.6" rental. Buyers remorse!

The 3.6" is a dream to draw, aim and shoot.
It feels significantly lighter but I have not discovered why.
Now I believe That 3.6" is actually the LE version with night sights and the older Slimmer slide catches. Slimmer being a better carry choice (if it did not have that aggressive grip texture). Along those lines, I intend to go without the thumb safety.

Also, the slide is fairly narrow. I originally had a Holosun 507C optic but it felt too wide for my smaller hands. So, I am shopping for the thinner K version (407k).

On the other hand, I am more accurate with the 4" iron sights.
The 4" barrel length is actually 4.07". And I replaced that with the longer 4.22" (4.25") barrel.

note: I fixed the gritty trigger by rounding the striker plunger and trigger bar.