The USP Elite is hands down the MOST accurate .45 acp factory mostly original pistol I have ever owned.
(I did change the sights.)
The G41 has shown itself to be everything I expected it to be, a 14 shot replacement for the 1911 type pistols.
Reliability of both has been flawless.
Shootability is ergo near perfect though some may find the USP to feel quite large in the hand it is more visual than actual IF you have large hands, (I do).
Switching the magazine baseplates to flat bottoms can correct the intimidating size appearance as the frame is identical to the standard .45 acp USP.
Magazine capacity is comforting at 12 rounds but unnecessary for what is to me, a dedicated target shooting pleasure pistol..
I do have a set of Trijicons for the G41 but it has shot so well with the factory sights in place that I have yet to change them out.
I do not use any of the included add on backstraps with the G41 as I found the Gen 4 slim frame design perfect as is for me.
I have installed an extended slide release and also installed an NY-1 trigger spring, (I do this to all my Glocks.)
Normally I use a 3.5 pound connector but on this gun I am using a 5 pound connector.
The pull is heavier than factory but more important,is the reset is pronounced, crisp and positive. I like this.
The only downside to these pistols is both utilize polygonal type rifling, nice for cleaning but it disallows the safe shooting of lead only bullets and requires both be used with jacketed bullet ammunition.
Eventually I will get a Lone Wolf conventional rifled barrel for the Glock.
None are made aftermarket for the USP that I am aware of.