Description
When you're running a Zenith roller-delayed gun like a Z-5 or Z-43P, the sear is one of those small parts that has to work every single time. This is the genuine MKE semi-auto sear, the exact same component that comes standard in these firearms straight from the factory. If yours has taken a beating over thousands of rounds or you're building out a spare parts stash, this is the piece that keeps your trigger group doing its job.
What Sets the MKE Sear Apart
This is a complete assembly, not just a bare part you'll have to source pieces for. It's constructed from matte blued steel and includes a Swiss-turned detent and detent spring, so it goes in ready to run. Being made in Turkey by MKE on the original HK technical data package and tooling, the fit and quality match what you'd expect from the roller-delayed platform these guns are cloned from.
Fitment Across the Zenith Lineup
The semi-auto sear is a direct replacement across Zenith's roller-delayed blowback family chambered in 9mm and 5.56 NATO. That covers popular models like the Z-5 series and the Z-43P, so if you own one of these HK-style guns, this part is meant to work with it. Keep in mind these firearms are built to tight tolerances, and swapping fire-control components on a roller-delayed system is precise work.
Getting It Installed Right
Zenith recommends that a qualified gunsmith handle installation, and that's advice worth taking. Roller-delayed guns depend on everything being fitted correctly, and a trained hand will make sure the sear seats and functions the way it should. Once it's in, you've got a factory-correct part backing up one of the most reliable actions ever designed.
Key Specifications
- Manufacturer: Zenith Firearms
- Model: MKE
- Manufacturer Part Number: A7-98
- UPC: 818300021720
- Part Type: Semi-Auto Sear (complete assembly)
- Material: Matte blued steel
- Included Components: Swiss-turned detent and detent spring
- Compatible Calibers: 9mm and 5.56 NATO roller-delayed models
- Compatible Models: Zenith Z-5 series, Z-43P and other roller-delayed blowback guns
- Country of Origin: Turkey (MKE)
- Fitment: Direct factory replacement
What’s Included
- MKE semi-auto sear (complete assembly)
- Swiss-turned detent
- Detent spring
Frequently Asked Questions
Which Zenith guns does the MKE semi-auto sear fit?
It's a direct replacement for the sear that comes standard in Zenith's roller-delayed blowback firearms chambered in 9mm and 5.56 NATO. That includes popular models like the Z-5 series and the Z-43P. Since it's the genuine factory part, it matches the original spec these guns ship with.
Is the MKE sear a complete part or do I need extra pieces?
It's a complete assembly ready to install. The sear comes with a Swiss-turned detent and detent spring already included, so you're not chasing down small parts to finish the job. It's built from matte blued steel to match the rest of the fire-control components.
Can I install the MKE sear myself?
Zenith recommends that a qualified and trained gunsmith handle installation, and that's solid advice for a roller-delayed platform. These guns run on tight tolerances, and proper fitment of fire-control parts matters for reliable function. A gunsmith will make sure everything seats and works correctly.
Is this a genuine MKE part or an aftermarket copy?
This is a genuine MKE component manufactured in Turkey, the same maker that builds the roller-delayed guns Zenith imports. It's produced using original HK technical data and tooling, so the quality and fit line up with the platform. It's the exact part these firearms come with from the factory.




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