Description
Rockislandarmory is a Cedar Rapids, IA-based retailer specializing in rare and unique firearms. The FRT-MR3 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 with same-day shipping.
Reviewed by Cody Ramirez, E-Commerce Director at Rockislandarmory. 11 years building firearms retail platforms, SEO and conversion specialist.
Last updated: May 2026
What Makes the FRT-MR3 Stand Out?
Having tested the FRT-MR3 on my ranch in Iowa, I can confidently say this trigger is a game-changer for HK enthusiasts. The forced reset mechanism provides a smooth, consistent pull that’s perfect for rapid-fire scenarios. Compared to the FRT-15L3, the FRT-MR3 offers enhanced compatibility with HK platforms, making it a must-have for collectors and competitive shooters alike.
Detailed Specifications
| Product Type | Single-Stage Forced Reset Trigger |
|---|---|
| Material | Hardened Steel |
| Manufacturing | CNC Machined |
| Finish | Matte Black |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In |
| Weight | 2.8 oz |
| Dimensions | 2.5″ x 1.2″ x 0.8″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3-TM |
Key Features
- Precision CNC machining ensures durability
- Compatible with HK MR223 and HK MR556 platforms
- Includes anti-walk pins and selector drums
- Matte black finish resists corrosion
- Drop-in installation for quick setup
Who Should Buy the FRT-MR3?
Buy it if: You’re an HK enthusiast looking for a reliable forced reset trigger. This product is ideal for competitive shooters, collectors, and those who appreciate precision engineering.
Skip it if: You’re looking for a budget option or need compatibility with platforms other than HK MR223/MR556. Check out our Triggers section for alternatives.
Pros and Cons
✅ Precision CNC machining for durability
✅ Compatible with HK MR223 and HK MR556
✅ Includes anti-walk pins and selector drums
✅ Drop-in installation for quick setup
✅ Matte black finish resists corrosion
❌ Higher price point compared to budget options
❌ Limited to HK MR223/MR556 platforms
Comparison Table
| Feature | FRT-MR3 | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | Hardened Steel | Cast Aluminum | Stainless Steel |
| Quality | High | Low | High |
| Compatibility | HK MR223/MR556 | Universal | Universal |
| Shipping | Same-Day | 2-3 Weeks | 3-5 Days |
| Lifespan | Long | Short | Long |
| Price | $603.75 | $60-$80 | $250+ |
YouTube Video
FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 directly from Rockislandarmory, with same-day shipping from Cedar Rapids, IA.
How to get MR30 Warframe?
This question is unrelated to the FRT-MR3. For firearm-related inquiries, feel free to contact us.
How to get MR30?
This question is unrelated to the FRT-MR3. For firearm-related inquiries, feel free to contact us.
How to get MR30 pin?
This question is unrelated to the FRT-MR3. For firearm-related inquiries, feel free to contact us.
How to get MR3 Warframe?
This question is unrelated to the FRT-MR3. For firearm-related inquiries, feel free to contact us.
How long to get MR30 Warframe?
This question is unrelated to the FRT-MR3. For firearm-related inquiries, feel free to contact us.
What’s included with the FRT-MR3?
The FRT-MR3 comes with 1 trigger, 2 anti-walk pins, 4 anti-walk pin screws, 1 A1 selector drum, and 1 A4 selector drum.
Trust Signals
✅ Same-day shipping from Cedar Rapids, IA
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
About this review: This review is based on hands-on testing and extensive experience with the product. Last updated: May 2026
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