I recently sold my beloved M&P9pro to a friend who wanted my exact gun. I used the funds to buy a fullsize M&P9 with apex DCAEK. I love the ergos of the M&P family, but the stock trigger, while workable, leaves something to be desired. Enter apex tactical. Many are familiar with the apex sear, which reduces pull weight, overtravel and length to reset. Unfortunately in some pistols some of the gritty feeling remains, and reset can be weak. The DCAEK (duty/carry action enhancement kit) replaces the sear, sear spring, trigger spring, striker block, and striker block spring to yield a ~5 lb trigger pull with a smooth takeup, crisp break, and more forceful reset.
The M&P9pro I sold:
Already owning a M&P9c with the apex sear I wanted to take the next step, so I picked up my fullsize with dcaek and did some sanding and texturing. I find the stock texture too smooth so I stippled the grip frame. I also sanded down the base of the trigger guard for a more comfortable radius and took some material off the toe on the frontstrap. I use compact floorplates (smoother reloads from double mag pouches vs standard) so the toe is unnecessary and sometimes gets caught on my shirt during the draw.
Today was the inaugural range trip, and as expected it performed flawlessly through ~230 rounds. The trigger was very smooth and the reset superb. One simply has to slightly reduce the pressure of their index finer for the trigger to snap back to firing position under recoil, leaving you ready to shoot again the moment your sights are on target. The more aggressive texture was very helpful. Between the Texas heat and a rapid firing pace my hands were very sweaty, but didn't slip. Once the Warren Tactical sights I ordered some in this pistol will require nothing more than a steady diet of ammo.
I strongly recommend that M&P owners purchase at least the sear from apex tactical, if not the whole DCAEK. It makes a world of difference and produces the best carry trigger in a striker fired pistol I have ever experienced. (glock, XD, XDM) I also find it preferable to the SA pull of many DA/SA designs. (H&K P30, CZ75B, Sig, FN FNP).