Polymer80Pistol is a Nampa, ID-based retailer specializing in high-quality firearm components. 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.
Reviewed by Kyle Brennan, Chief Armorer at Polymer80Pistol. 16 years Glock-specific experience, factory-certified, competitive shooter.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | CNC Machined |
| Finish | Black Oxide |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In Design |
| Weight | 2.5 oz |
| Dimensions | 1.5 x 1 x 0.5 inches |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3 |
Key Features
- Precision Engineering: CNC-machined for exact tolerances.
- Drop-In Design: Easy installation with no gunsmithing required.
- Durable Finish: Black oxide coating for long-lasting corrosion resistance.
- Anti-Walk Pins: Included for secure installation.
- Selector Drums: Comes with both A1 and A4 drums for versatility.
Who It’s For
Buy it if: You own an HK MR223 or MR556 and want a reliable, high-performance forced reset trigger.
Skip it if: You’re looking for a budget option or don’t own a compatible platform. Check out our Triggers for alternatives.
Pros & Cons
- ✅ CNC-machined for precision
- ✅ Drop-in installation
- ✅ Includes anti-walk pins
- ✅ Versatile with A1 and A4 drums
- ❌ Higher price point
- ❌ Limited compatibility
Comparison
| Feature | FRT-MR3 | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | High-Grade Steel | Low-Grade Steel | High-Grade Steel |
| Quality | CNC Machined | Cast | CNC Machined |
| Compatibility | HK MR223/MR556 | Generic | HK MR223/MR556 |
| Shipping | Same-Day | 2-3 Weeks | Same-Day |
| Lifespan | Long | Short | Long |
| Price | $603.75 | $60-$80 | $250+ |
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FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 at Polymer80Pistol.
How to get MR30 Warframe?
Reach Mastery Rank 30 by leveling up various equipment and completing missions.
How to get MR30?
Accumulate Mastery Points by leveling weapons, frames, and companions.
How to get MR30 pin?
The MR30 pin is awarded upon reaching Mastery Rank 30 in Warframe.
How to get MR3 Warframe?
Level up your equipment to accumulate Mastery Points and reach MR3.
How long to get MR30 Warframe?
It varies, but expect several months of dedicated play to reach MR30.
✅ Same-day shipping from Nampa, ID
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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