Just on the AEK which is made for competition only, you're looking for the DCAEK
The APEX Duty/Carry Action Enhancement Kit (DCAEK) was designed to provide the M&P (9 mm, .357 Sig & .40 only) pistol owner a smooth, consistent 5 - 5.5 lb trigger pull with the advantages of shorter over-travel and reduced reset. The kit includes:
* APEX Hard Sear (9 mm, .357 Sig & .40 series) - NOT FOR .45 ACP
* APEX M&P Ultimate Striker Block Kit (USB kit)
* APEX M&P Increased Rate Sear Spring** (very small) & Trigger Return Spring
**PLEASE NOTE: the Sear Spring works for non-MA compliant pistols
All of the components work together to provide a pull weight within the acceptable range for a top end service pistol. The kit itself is engineered to be drop-in and should require NO further gunsmithing (however, armorer or gunsmith installation is recommended).
The APEX Duty/Carry Action Enhancement Kit (DCAEK) was designed to provide the M&P (9 mm, .357 Sig & .40 only) pistol owner a smooth, consistent 5 - 5.5 lb trigger pull with the advantages of shorter over-travel and reduced reset. The kit includes:
* APEX Hard Sear (9 mm, .357 Sig & .40 series) - NOT FOR .45 ACP
* APEX M&P Ultimate Striker Block Kit (USB kit)
* APEX M&P Increased Rate Sear Spring** (very small) & Trigger Return Spring
**PLEASE NOTE: the Sear Spring works for non-MA compliant pistols
All of the components work together to provide a pull weight within the acceptable range for a top end service pistol. The kit itself is engineered to be drop-in and should require NO further gunsmithing (however, armorer or gunsmith installation is recommended).

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