Just curious, I found it just out of reach to be convenient on my FNP-9, wondered if the 45 was any different.

Yes. The FNP-45 and later FNX-9/40 moved the safety and slide lock rearward.

I have to slightly adjust my grip on the FNP-45 USG, but then again I find that is the case with most or all of my double stack guns.

I can right handed shooting, left handed shooting, the slide stop is ackward and doesn't work as well as right.

It's not a slide release.   It's a slide stop

The control is meant only to manually lock the slide back.  Release of the slide on the FNP-45 should be accomplished by slingshot method on a loaded mag.  Autoforwarding works too.

It's small for a reason.  

Completely agree :) It's why it's called a slide stop as you said :)

Or complete BS.

From the manual, if you want to argue semantics:

Thanks for the input guys.

Doesn't really matter to me what the name is,  or it's intended function.  Only that I can reach it without altering my grip.  If I cant, I buy an XD.

That doesn't say to use your thumb to release it either now does it?.

What should he use?

Overhand slingshot with weak hand on a loaded magazine.

Yes but its not the easiest one to reach

+1 its so easy to grab the whole slide and pull, why would you dick around learning it any other way

edit - didn't realize this thread is so old, oh well

Yes, it's an old thread, but it still bears repeating.

Yeh, it's an old thread, but I finally got the FNP-45 about two weeks ago.

Actually, I was just curious if it was reachable....

I personally might dick around learning it the "wrong" way since I already did, 11 years ago when I started carrying a Walther P99.  It's perfectly reachable and usable on that gun, and is now second nature.  

Back then I had one gun to learn to use and it was available.  Now I have 9 choices, but only carry the ones most similar to the P99 because it's operation became habit.  No manual safeties that can't be left in the off position, no grip safeties....etc.

Maybe I shoulda learned it a different way.....but I didn't.  

Maybe I will try to learn it a more "universal" way, I don't know

It's no different than the Idea of why I don't like Mossberg shotguns, or why I don't use my 1200 Defender for defense.......the safety's in the wrong place.  Not that they're wrong, nor am I incapable of learning something different......but my Benelli and FN shotgun have the same safety location as the Remington 870 I've shot for the last 26 years.  In my opinion, better choices for me.  I'd rather depend on old habits when the time comes to switch the safety off.