There is no "best". There are some better suited than others. For instance a Nesmuk knife is better suited for woodsmanship than a karambit. A Ka-bar can be effective depending on the model or modifications done to the profile of the blade.
There are a host of factors to think about such as...
If you're interested, a way to contact your reps. This is through the NSSF
https://cqrcengage.com/nssf/app/onestep-write-a-letter?0&engagementId=514483
I have a Glock. It's a tool and nothing more (to me) but I also have a 1911 and a SAA revolver clone and I LOVE those guns. The 1911 is my primary carry gun
Got some memorial ink to honor my boy, Odin. The paw is the same size as his and the nail imprints are the same. It was copied from a paw impression after he passed away. In the toes it reads "O-D-I-N"
For the military an "effective range" is that plus being able to kill your enemy at that distance as well. So, reliably kill an enemy from, for example say, 300 yards