I've had my FNX 45 Tactical for a few weeks now and have put around 500 rounds through it so I'll add my brief experience.
Pros:
10 rounds of acp(mags are 15 rounders pinned to ten)
Suppressor sights, I found them fast to acquire and easy to line up.
Ambi controls
Easy to field strip.
Comes with 3 other interchangeable back steps
Comes with mounting hardware and Allen keys for mounting a reflex sight
You can mount an RMR.
Looks badass
Cons:
DA trigger pull
It seems bulkier than it really is.
Tan is constantly dirty.
Mags were pinned with enormous rivets which actually meant the mags had to be manually removed.
Carry case is neat, but not sure if it's legal by itself. (Not hard plastic, not externally lockable)
Thread protector comes loose.
Holster selection can be limited.
It was a jump for me, moving from 1911's To this gun. But I find it fits my hand well, points well, and is nicely balanced when loaded with 10 rounds of 45.
It is accurate. But I think most factory pistols these days are more accurate than they get credit for.
I went to Gregg's distributors and picked up a few o rings that looked close to the size of my barrel. Cost me about $0.50 cents. I put the oring on the barrel, then threaded the protector on. It no longer comes loose.
I found a holster maker down south. Already cut out for an RMR.
The double action trigger is new to me, so I can't compare it to others. But if it bothers you to much, there is the option to carry cocked and locked, rather than decocked.
I personally really like this gun. It's my new favorite pistol to be honest. I put an RMR on and it's tons of fun.
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