Got back to the range today and here are the results.
This is honestly the best target when benching the FS M&P 9mm.
5rds/S&B 115gr./15 yards/benched
The next two target are from off hand shooting with slightly quick, consistent trigger pulls. I actually seemed to be able to get better groups this way and shockingly enough, the Tula (I wrote Wolf on the paper

) ) was the most accurate. Although none of it is even slightly impressive, I guess it like the grungiest ammo the best.
16rds/Tula 115gr./15 yards/offhand
15rds/HST 124gr.+P/15 yards/offhand
The Apex sear did help with the trigger over stock and may have helped a tad with offhand shooting since there were no fliers. I've shot plenty of poly guns like XDs and Glocks, DA/SA pistols galore and many many SAO semi-autos like 1911s so I don't think it has anything to do with my shooting or trigger control when it comes to the accuracy of the FS M&P 9mm.
ETA: Just to be clear in case someone asks, I've owned probably 50+ handguns in my lifetime, many of them striker fired poly guns and I've gotten better groups using the same type of ammo. I also benched it so only a ransom rest is left to test it out, which I don't have. I can get 4" groups or less with a 1911,XD,Glock, Ruger P-Series,Beretta,Sig,CZ, S&W and Ruger revolvers, BHP, etc so I would say it must have something to do with the gun since all those guns have different types of triggers and configurations.