Seven round mags, more of an Officer clone (3.5") than a Defender. Nonetheless, the speed trigger and the replacement slide stop along with the FLGR indicate that the pistol has been "worked" before you bought it. Not a stock RIA compact.
Nonetheless, I agree with my man canebrake that the emphasis on groups should probably be the last thing you want to do. Center mass close up and personal is what your new baby is good for.
make a compact pistol into an equal to a 5" as far as accuracy is concerned. You can do this with carry in mind. It is strictly up to you. You've got to put some bucks and considerable elbow grease into it however;
Depends on philosophy, the Colt above conceals very well (for me), and hangs right with my 5" pistols at target work. I personally prefer a carry pistol that is capable of engaging targets @ 25 yards and greater. That may be the antithesis for some who want a "belly gun".
I built this pistol with reliability and accuracy in mind over a stock M1991A1 Compact. I carry it every day. I have big hands, hence the slim grips and the magwell extension. I replaced the "plug" recoil system with a Kings FLGR and reverse plug (removed .09 from the dust cover), hard chrome, and de-horned adjustable sights provide finish durability (holster scrub) and, the ability to zero with a variety of ammunition (bullet weights and types).
A Storm Lake match barrel and bushing round out the package in conjunction with a rework of the Colt trigger group for a crisp "combat carry " pull.
have fun with that RIA, good luck with it.