Action Enhancement Trigger Kit for M&P

This drop-in trigger kit is designed for the Smith & Wesson M&P (9mm or .40 S&W) to deliver a smooth, consistent 5.0 to 5.5 lb. trigger pull with a shorter over-travel and a reduced reset. It eliminates the gritty uptake and excessive take-up common to factory M&P triggers, providing a cleaner break and faster follow-up shots without compromising factory safety values.

Compatibility

• Smith & Wesson M&P 9mm (full-size, compact, Shield models not included)
• Smith & Wesson M&P .40 S&W (full-size, compact)
• Requires 1/8″ sear plunger and spring. Not compatible with older 1/16″ sear housing blocks without upgrade.

Key Features

• Pull weight: Reduces trigger pull by approx. 1 lb. to 5.0–5.5 lb. range
• Travel reduction: Pre-travel and over-travel reduced by approx. 20%
• Break: Crisp, clean break with smooth uptake and reset
• Safety: Maintains factory drop-safety with center-mounted pivoting safety
• Installation: Drop-in replacement parts; no fitting or gunsmithing required

Install Difficulty

Level: 2/5 — Moderate. Requires disassembly of the M&P fire control system. Tools needed: punch set, small hammer, and a 1/8″ sear plunger/spring (if not already installed). Expect 20–40 minutes for first-time install.

FAQ

Will this work with my M&P Shield?

No. This kit is designed for standard M&P 9mm and .40 S&W models only. Shield variants use a different trigger system.

Do I need to modify the sear housing block?

Yes, if your M&P has a 1/16″ sear plunger and spring, you must upgrade to a 1/8″ sear housing block before installing this component. All function and reliability testing was done with the 1/8″ setup. Modern sear housing blocks are available from Brownells and other online retailers.

Can I install this without a gunsmith?

Yes. This is a drop-in kit requiring no fitting. Basic mechanical skills and a punch set are sufficient. Follow the included instructions carefully; improper installation may affect safety or function.

Shipping & Warranty: Ships within 1 business day. Covered by manufacturer warranty against defects in materials and workmanship. No returns on installed or modified components.