I beg to differ on accessories.
Trigger shoes I never have recommended on any gun, and this goes way way back.
For sure I will never recommend an over-sized trigger shoe.
Pinkie Extension is the only accessory "I can go along with".
I would recommend sticking with the factory magazines, and having at least one magazine
Without a pinkie extension.
The Mec-Gar factory mags are really great!
These P-11 conceal extremely well with NO extensions.
I have been piddling for some time with various "finger" and "pinkie" extensions and disabling guns that use them.
Just something I wanted to do...
I just wish more magazines were sealed at the bottom, NOT able to be taken apart from the base.
Just drop your favorite easy to take apart mag, with or without pinkie extension , and then drop say a USGI / Colt 7 round mag.
Take note the USGI/ Colt , sealed bottom mag, with or without a bump pad is not affected like easy to take apart mags, especially with pinkie extensions.
It does not matter how many round a mag holds, if the mag gets disabled, NONE of the rounds are ever going to be chambered, much less fired.
Careful with the mags that extend way past a grip well...
For fun and testing I chose to "hit the deck" and while the gun run "hitting the deck", bouncing off the deck the extended mags, or extensions hitting the deck...busted in various ways and some guns will not run without a mag in the gun.
When I find the original base plates to my P-11 mags, I am removing my pinkie extensions...