Ruger based the new pistol on specs for the military trials & I'm not entirely sure but suspect there were initial intentions to compete. That's me speculating.
I do know that the decision was made at some point not to participate in the trials.
The comment was along the lines of "The best way to make a little money off a government contract is to spend a lot of money."
My sense is they decided they didn't need or want military contracts & the attendant hoopla that goes along with 'em.
Once the decision was made not to compete, Ruger diverged a little from the military parameters.
One variance is the "ambi" slide lock that isn't an ambi slide lock.
Mil specs called for a fully functional left-side/right-side slide lock/release.
Ruger altered the function to make it ONLY a left-side release.
It can be upped from either side to lock the slide back, but to avoid auto-closing it's not intended to be released from the right side.
And so on.
The pistol is fully service-worthy, I consider it Ruger's first pro-grade service pistol design.
They certainly can go after the LE market, I don't know what their overall marketing strategy is for it.
I'm passing on comments relative to the modularity issue here because the question came up on another forum & I asked a Ruger contact a couple days ago.
When I did my test run on the full-sized American 9, I found adjusting my grip to center the pistol in my hand, coupled with the right grip insert, removed any tendency to do the knuckle knock.
Denis