You won't be disappointed, Joe! Also, if you take the trouble to polish the inside of the lock plate, the tops of the trigger levers, and the sear arm where it bears on the trigger levers, you will reduce the effort to pull the trigger and get a better let off with the set trigger. Btw, a longer screw (odd size pitch & thread though) will also help as the factory version is too short. OTOH, many just spend $$$ for the Davis Deer Slayer trigger, which is supposed to be a drop in fit for the GPR.
Joe,... I completely agree with Maven,
you won't be disappointed. I know, because I've had 6 or 7 GPR's between 1969 and 1998.
Maven mentions the trigger-set screw bein' an "odd size pitch & thread though",.... yes,.. it's metric, and it's almost impossible to find one to replace it. I used to tear apart old CB's and 8-track tape-decks just for the screws to replace the ones in GPRs.
Last spring I couldn't take it any longer, watching Rob and a few other fellas talk about their new GPRs,.... so I ordered another one (just to have around).
As for the short metric thread trigger-set screw on my newest GPR,.... these days it's almost impossible to even find old tape decks for their screws.
So I went to a hardware store and picked up a couple screws that had (IIRC) 8x32 threads,.... then I simply ran an 8x32 tap into the metric hole (no drillin' or nuthin') followed with one of the new screws (to find it's proper length for the approximate adjustment I wanted), then took it back out, cut it off, and ran it back in the hole with a bit of clear fingernail polish on the threads.
The fingernail polish keeps it in place after dryin',.... but lets you adjust the screw (if need be) after the triggers get smoothed up from shooting.