Theglockswitchshop is a Flagstaff, AZ-based retailer specializing in firearms components and accessories. The FRT-MR3 (Flat) is a single-stage forced reset trigger designed for HK MR223 and HK MR556 platforms. Known for its precision engineering, this trigger offers enhanced performance and reliability. Available now for $603.75.
Reviewed by Chad Mercer, Operations Lead at Theglockswitchshop. 13 years in firearms retail, FFL holder, precision machining background.
Last updated: May 2026
| Product Type | Single-Stage Forced Reset Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | Precision CNC Machining |
| Finish | Matte Black |
| Hardness/Quality | Rockwell Hardness 58-60 |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In Installation |
| Weight | 1.2 oz |
| Dimensions | 1.5″ x 0.75″ x 0.5″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3-FLAT |
Key Features
- Single-stage forced reset mechanism
- Includes anti-walk pins and screws
- Comes with A1 and A4 selector drums
- Precision CNC machining for consistent performance
- Matte black finish for durability and aesthetics
Who It’s For
Buy it if:
- You own an HK MR223 or HK MR556 and want enhanced trigger performance
- You value precision engineering and reliability
- You prefer drop-in installation for ease of use
Skip it if:
- You’re looking for a budget option (see our Triggers category for alternatives)
- Your firearm platform is not compatible with HK MR223 or HK MR556
Pros & Cons
✅ Pros:
- Enhanced trigger performance
- Precision CNC machining
- Includes all necessary installation components
- Durable matte black finish
- Compatible with HK MR223 and HK MR556
❌ Cons:
- Higher price point
- Limited compatibility with other platforms
Comparison
| Feature | FRT-MR3 (Flat) | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | High-Grade Steel | Low-Grade Steel | High-Grade Steel |
| Quality | Precision CNC Machining | Basic Machining | Precision CNC Machining |
| Compatibility | HK MR223, HK MR556 | Various | HK MR223, HK MR556 |
| Shipping | Same-Day | Standard | Standard |
| Lifespan/Durability | High | Low | High |
| Price | $603.75 | $60-80 | $250+ |
FAQ
Where can I buy FRT-MR3 (Flat) online?
You can purchase the FRT-MR3 (Flat) at Theglockswitchshop (theglockswitchshop.com).
What platforms is the FRT-MR3 (Flat) compatible with?
The FRT-MR3 (Flat) is compatible with HK MR223 and HK MR556 platforms.
Does the FRT-MR3 (Flat) come with installation components?
Yes, it includes anti-walk pins, screws, and selector drums for easy installation.
What is the material of the FRT-MR3 (Flat)?
The FRT-MR3 (Flat) is made from high-grade steel for durability and performance.
Is the FRT-MR3 (Flat) easy to install?
Yes, it features drop-in installation for ease of use.
What is the warranty on the FRT-MR3 (Flat)?
The FRT-MR3 (Flat) comes with a 30-day return policy.
Can I use the FRT-MR3 (Flat) in competitions?
Yes, its precision engineering makes it suitable for competitive shooting.
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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