Michigan Gunshop is a Grand Rapids, MI-based retailer specializing in firearms and accessories. The FRT-MR3 (FLAT) is a Single-Stage (3-Position) Forced Reset Trigger designed for the HK MR223 & HK MR556. Engineered for precision and reliability, this trigger is available now for $603.75.
Reviewed by Michigan Gun Shop Staff, Federally Licensed Firearms Dealer at Michigan Gunshop. Type-1 FFL holders, Class 3 SOT, serving Michigan since 2014.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | Mil-Spec |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In |
| Weight | 2.5 oz |
| Dimensions | 2.75″ x 1.25″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3-FLAT |
Key Features
- Single-Stage (3-Position) Design
- Includes Anti-Walk Pins and Screws
- Comes with A1 and A4 Selector Drums
- CNC Machined for Precision
- Mil-Spec Quality
Who It’s For
This trigger is ideal for:
- HK MR223 and MR556 Owners
- Competitive Shooters
- Firearms Enthusiasts
Pros & Cons
- ✅ Precision CNC Machining
- ✅ Mil-Spec Quality
- ✅ Includes Anti-Walk Pins
- ❌ Higher Price Point
- ❌ Limited Compatibility
Comparison
| Feature | FRT-MR3 (FLAT) | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | High-Grade Steel | Low-Grade Steel | High-Grade Steel |
| Quality | Mil-Spec | Non-Mil-Spec | Mil-Spec |
| Compatibility | HK MR223, HK MR556 | Multiple Platforms | HK MR223, HK MR556 |
| Shipping | Same-Day | 1-2 Weeks | Same-Day |
| Lifespan | Long | Short | Long |
| Price | $603.75 | $60-$80 | $250+ |
FAQ
Where can I buy FRT-MR3 (FLAT) online?
You can purchase the FRT-MR3 (FLAT) at Michigan Gunshop.
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 this trigger compatible with other platforms?
No, the FRT-MR3 (FLAT) is specifically designed for HK MR223 and HK MR556 platforms.
What is the installation process?
The FRT-MR3 (FLAT) is a drop-in trigger, making installation straightforward for most users.
What is the return policy?
Michigan Gunshop offers a 30-day return policy for this product.
Is shipping discreet?
Yes, all shipments from Michigan Gunshop are discreetly packaged.
What is the price?
The FRT-MR3 (FLAT) is priced at $603.75.
✅ Same-day shipping from Grand Rapids, MI
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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