Evolution IV Revolver Hammer Kit

Description

The Evolution IV Revolver Hammer Kit replaces factory MIM parts with a pinned sear and stirrup assembly, the same design used in Performance Center hammers. This kit converts your revolver to Double Action Only (DAO) operation, giving you a consistent, repeatable trigger stroke every time. For competition shooters running a wheelgun in USPSA, ICORE, or steel challenge, that consistency translates directly to faster, more accurate splits. For duty rigs, the DAO conversion eliminates the risk of an accidental single-action discharge under stress, while the reduced pull weight makes follow-up shots more controlled.

With proper tuning, this kit can drop a factory DAO trigger pull from 12+ pounds down to a competition-ready 4.0 pounds. At that point, you will want to handload your ammunition to maintain primer reliability and ignition consistency. The kit is designed for shooters who demand precision from their revolver and are willing to put in the setup time to get the trigger exactly where they need it.

Key Benefits:

• DAO Conversion – Forces each shot to start from a fully reset double-action pull, critical for defensive carry and competitive stages where a single-action hammer fall could cost you points or safety.
• Pinned Sear & Stirrup – Replaces MIM components with a machined assembly that provides a cleaner break and more consistent trigger geometry over thousands of rounds.
• Reduced Trigger Pull – Factory DAO triggers often exceed 12 lbs. The Evolution IV, when properly tuned, can reach 4.0 lbs, making extended strings of fire far less fatiguing and more accurate.
• Performance Center DNA – Uses the same pinned sear and stirrup design found on factory Performance Center hammers, giving you a proven upgrade path without sending your gun out for custom work.

Specifications & Fitment:

• Action: Double Action Only (DAO) – converts any compatible S&W revolver to DAO operation.
• Pull Weight: Capable of 4.0 lbs DAO with proper tuning (handloads recommended at this pull weight for reliable primer ignition).
• Components: Includes hammer body, pinned sear, stirrup, and necessary pins. Does not include trigger return spring or mainspring – you will need to select those based on your target pull weight.
• Compatibility: Fits Smith & Wesson small, medium, and large frame revolvers (J, K, L, N frames) with standard hammer-mounted firing pins. Not compatible with frame-mounted firing pin models (e.g.,