I've got a HK45CT, the compact tactical model in V3, no safety, decock only lever.
This pistol is very slim, on 1.14 inches thick.
I've handled numerous FNX45's. And while I love FNH in general, I couldn't get past the toy feel of the gun. The action, the grip. It all feels like a toy.
The HK45C, or CT is built much heavier! Plus, it uses a O ring lock up barrel for better accuracy.
My gun is rated for 45+P 45+P+, even 45 Super ammo .
I love it, and while it did cost me about $1,100 new.
It's about the best polymer pistol you can buy. This HK45CT replaced the Mk23, and the navy seals use the HK45CT V3 model which is now the MK24 MOD 0 with a AAC Tirant 45S suppresor/ gun package as standard issue.
This is a old thread, but. A sweet pistol.