I like the Trijicon RMR as shown on this G-40 gen 4 with KKM barrel.
Picture doesn't show high Trijicon irons added later to co-witness the RMR. To me, I can pick up the dot faster that way.
I tried aftermarket triggers, sent them back, went with factory trigger worked over by my gunsmith bud who's a factory trained Glock Armorer. He's a retired SWAT sniper, knows his stuff.
Grip was worked over by Sinners Mass in San Antonio. I don't like those finger grooves, like the way they reworked the grip frame.
DF