Glockswitchpro is a Cedar City, UT-based retailer specializing in tactical accessories and firearm components. The FRT-MR3 (Flat) is a single-stage, 3-position forced reset trigger designed specifically for the HK MR223 and HK MR556 platforms. Its precision engineering ensures reliable performance under demanding conditions. Available now for $603.75, this trigger is ready to ship today.
Reviewed by Nate Sullivan, Product Manager at Glockswitchpro. 11 years sourcing and testing tactical accessories, former military.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | Precision CNC Machining |
| Finish | Black Oxide |
| Hardness/Quality | Mil-Spec |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In Design |
| Weight | 2.1 oz |
| Dimensions | 1.5″ x 0.75″ x 0.25″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3-FLAT |
Key Features
- Single-stage design for consistent trigger pull
- 3-position forced reset mechanism
- Includes anti-walk pins and selector drums
- Mil-spec hardness for durability
- Drop-in installation for easy setup
Who It’s For
Buy it if:
- You own an HK MR223 or HK MR556 and want a reliable forced reset trigger
- You prioritize precision and durability in your firearm components
- You prefer drop-in installations for ease of use
Skip it if:
- You’re looking for a budget-friendly option (check out our Triggers section for alternatives)
- You don’t own a compatible firearm
Pros & Cons
✅ Pros:
- Precision CNC machining ensures high quality
- Mil-spec hardness guarantees durability
- Drop-in design simplifies installation
- Includes anti-walk pins and selector drums
- Designed specifically for HK MR223 and HK MR556
❌ Cons:
- Higher price point compared to basic triggers
- Limited compatibility with other firearm models
Comparison
| Feature | FRT-MR3 (Flat) | Cheap Import Trigger | Premium Brand Trigger |
|---|---|---|---|
| Material | High-Grade Steel | Standard Steel | High-Grade Steel |
| Quality | Mil-Spec | Basic | Mil-Spec |
| Compatibility | HK MR223, HK MR556 | Multi-Model | Multi-Model |
| Shipping | Same-Day | 1-2 Weeks | 1-2 Days |
| Lifespan/Durability | High | Low | High |
| Price | $603.75 | $60-80 | $250+ |
FAQ
Where can I buy the FRT-MR3 (Flat) online?
You can purchase the FRT-MR3 (Flat) directly from Glockswitchpro at glockswitchpro.com.
Is the FRT-MR3 (Flat) compatible with other HK models?
No, the FRT-MR3 (Flat) is specifically designed for the HK MR223 and HK MR556.
Does the FRT-MR3 (Flat) require professional installation?
No, the FRT-MR3 (Flat) features a drop-in design for easy installation.
What is included in the package?
The package includes 1 x FRT-MR3 Trigger, 2 x Anti-Walk Pins, 4 x Anti-Walk Pin Screws, 1 x A1 Selector Drum, and 1 x A4 Selector Drum.
Is the FRT-MR3 (Flat) legal in all states?
Laws vary by state. Consult local regulations before purchasing.
What is the return policy for the FRT-MR3 (Flat)?
Glockswitchpro offers a 30-day return policy on the FRT-MR3 (Flat).
How durable is the FRT-MR3 (Flat)?
The FRT-MR3 (Flat) is made from high-grade steel with mil-spec hardness, ensuring long-term durability.
✅ Same-day shipping from Cedar City, UT
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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