Kizuna Works MIM Steel Hammer, Black

The Kizuna Works Steel Hammer is a drop-in replacement for worn or polymer factory hammers in gas blowback pistols. If your GBB is developing inconsistent trigger response or the hammer shows signs of wear after heavy use, this is the direct fix — no machining, no fitting, just swap and go.

Why steel matters. Polymer hammers hold up for a while, but steel takes the repeated impact of the sear and slide without deforming. That means more consistent lockup and a cleaner reset over thousands of rounds. For a pistol you shoot regularly or train with, the upgrade is noticeable in the feel of the trigger and the reliability of the cycle.

MIM construction. This hammer is made using Metal Injection Molding, which produces tight tolerances and consistent density throughout the part. The result is a drop-in fit that matches OEM dimensions without requiring filing or adjustment. The black finish is functional, not decorative — it resists wear from internal contact points.

Before you buy. Confirm this hammer fits your specific pistol model. Kizuna Works parts are platform-specific, and a hammer designed for one GBB platform will not necessarily fit another. If you're unsure, check your pistol's make and model against the manufacturer's compatibility list. Installation requires basic disassembly of the slide assembly; if you're not comfortable doing that yourself, budget for a gunsmith visit.

Includes one steel hammer. Installation hardware and tools are not included.