Greetings all. Just got my ppq m2 4" today and plan to put some rounds through it tomorrow. I have two extra mags already ordered, and will likely upgrade the polymer sights with trijicons. My question to those of you with a little more experience than me, is whether or not upgrading the polymer guide rod and recoil spring makes any noticable noticeable difference. I do pretty well with managing recoil so it wouldn't be because i cant handle that, but i have heard some talking about getting better groupings with that particular upgrade. I am not a competition shooter, but love shooting in general. So if i can gain any advantage to help improve my accuracy beyond practice, i will take it. Thanks, and happy shooting to you all!