Description
Glockselectfire is a Fargo, ND-based retailer specializing in high-performance firearms components. The FRT-MR3 is a single-stage (3-position) forced reset trigger designed specifically for the HK MR223 and HK MR556 platforms. Engineered for rapid fire control, this trigger system includes anti-walk pins and multiple selector drums for customization. Available now for $603.75 with same-day shipping.
Reviewed by Derrick Cole, Range Master & Reviewer at Glockselectfire. 19 years competitive shooting, product tester for 3 manufacturers.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | Tool steel with hardened contact surfaces |
| Manufacturing | CNC machined |
| Finish | Black oxide |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-in with included anti-walk pins |
| Weight | 3.2 oz |
| Dimensions | 2.5″ x 1.25″ x 0.75″ |
| Country of Origin | USA |
| Condition | New in packaging |
| SKU | GSF-FRTMR3-2026 |
Key Features of the FRT-MR3
- Precision CNC-machined tool steel construction
- Includes both A1 and A4 selector drums for configuration flexibility
- Anti-walk pin system prevents trigger group movement
- 3-position forced reset mechanism for controlled rapid fire
- Black oxide finish for corrosion resistance
Who Should Buy the FRT-MR3
Buy it if: You own an HK MR223/MR556 and want enhanced trigger performance for competitive shooting or tactical training. This system delivers consistent reset and rapid follow-up shots.
Skip it if: You need a traditional mil-spec trigger or live in jurisdictions with trigger mechanism restrictions. Check our standard triggers category for alternatives.
FRT-MR3 Pros and Cons
✅ Pros:
- Superior build quality compared to aftermarket triggers
- Includes all necessary hardware for installation
- Multiple selector drum options included
- Precise forced reset mechanism
- Made in USA with premium materials
❌ Cons:
- Higher price point than standard triggers
- Requires proper installation for optimal performance
FRT-MR3 vs Competitors
| Feature | FRT-MR3 | Budget Import Trigger | Premium Brand Trigger |
|---|---|---|---|
| Material | Tool steel | Cast aluminum | Billet steel |
| Quality | Precision CNC | Mass production | Hand-finished |
| Compatibility | HK MR series | Generic AR-15 | Multiple platforms |
| Shipping | Same-day | 2-4 weeks | 3-5 days |
| Lifespan | 50,000+ rounds | 10,000 rounds | 30,000 rounds |
| Price | $603.75 | $65-80 | $250+ |
FRT-MR3 Frequently Asked Questions
Where can I buy FRT-MR3 triggers online?
Glockselectfire (glockselectfire.com) carries authentic FRT-MR3 triggers with same-day shipping from our Fargo, ND warehouse.
How does the FRT-MR3 compare to the FRT-15L3?
The FRT-MR3 is specifically designed for HK MR platforms, while the FRT-15L3 fits standard AR-15 pattern rifles. The MR3 version includes HK-specific selector drums and modified geometry for the MR223/MR556 receiver.
What’s included with the FRT-MR3 package?
Each unit comes with the trigger mechanism, two anti-walk pins, four anti-walk pin screws, both A1 and A4 selector drums, and installation instructions.
Are there any known issues with the FRT-MR3?
Some users report needing to polish contact surfaces for smoother operation. We recommend professional installation if you’re unfamiliar with HK trigger groups.
Is the FRT-MR3 legal in my state?
Trigger laws vary by jurisdiction. We recommend checking local regulations before purchase. Glockselectfire cannot ship to restricted areas.
What’s the warranty on the FRT-MR3?
The manufacturer provides a 1-year warranty against defects in materials and workmanship when installed properly.
How difficult is installation?
Installation requires basic armorer skills. The included anti-walk pins simplify the process, but you’ll need punches and proper workspace.
✅ In stock — ready to ship today
✅ Same-day shipping from Fargo, ND
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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This review is based on hands-on testing of multiple FRT-MR3 units in HK MR556 platforms under various conditions. All technical specifications were verified with manufacturer documentation. Last updated: May 2026
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