Polymer80Gun is a Asheville, NC-based retailer specializing in premium firearm components and accessories. The FRT-MR3 is a Single-Stage (3-Position) Forced Reset Trigger designed specifically for the HK MR223 & HK MR556 platforms. Its precision engineering ensures reliable performance under demanding conditions. Available now for $603.75, this trigger is in stock and ready to ship today.
Reviewed by Travis Holden, Technical Director at Polymer80Gun. 20 years in firearms engineering, machinist background, NRA-certified instructor.
Last updated: May 2026
Specifications
| 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 Installation |
| Weight | 2.8 oz |
| Dimensions | 2.5 x 1.2 x 0.8 inches |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3 |
Key Features
- Single-Stage (3-Position) Design
- Includes Anti-Walk Pins and Screws
- Compatible with A1 and A4 Selector Drums
- Precision CNC Machined Construction
- Black Oxide Finish for Durability
Who It’s For
Buy it if: You own an HK MR223 or HK MR556 and are looking for a reliable, high-performance forced reset trigger. This product is ideal for experienced shooters who demand precision and durability in their firearm components.
Skip it if: You’re looking for a budget option or need compatibility with other platforms. For alternatives, check out our Triggers category.
Pros & Cons
- ✅ Precision CNC Machined for reliability
- ✅ Includes Anti-Walk Pins and Screws
- ✅ Compatible with A1 and A4 Selector Drums
- ✅ Black Oxide Finish for enhanced durability
- ✅ Made in the USA
- ❌ Higher price point compared to some alternatives
- ❌ Limited compatibility with HK MR223 & HK MR556 only
Comparison
| Feature | FRT-MR3 | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | High-Grade Steel | Cast Aluminum | Stainless Steel |
| Quality | CNC Machined | Molded | CNC Machined |
| Compatibility | HK MR223, HK MR556 | Various | Various |
| Shipping | Same-Day | 1-2 Weeks | 3-5 Days |
| Lifespan/Durability | High | Low | Medium |
| Price | $603.75 | $60-80 | $250+ |
YouTube
FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 online at Polymer80Gun (polymer80gun.com).
How to get MR30 Warframe?
To achieve MR30 in Warframe, you need to level up all available equipment and complete all Mastery Rank tests.
How to get MR30?
Reach MR30 in Warframe by maximizing your Mastery Rank through leveling equipment and completing tests.
How to get MR30 pin?
MR30 pins are typically awarded by the game developers for reaching Mastery Rank 30 in Warframe.
How to get MR3 Warframe?
To reach MR3 in Warframe, level up your equipment and complete the Mastery Rank 3 test.
How long to get MR30 Warframe?
The time to reach MR30 in Warframe varies based on playtime and equipment progression, often taking several months.
FRT-MR3 vs FRT-15L3?
The FRT-MR3 is designed for HK MR223 & HK MR556 platforms, while the FRT-15L3 is compatible with AR-15 platforms.
Trust Signals
✅ Same-day shipping from Asheville, NC
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Internal Links
Browse more: Triggers | Full Shop
About this review: This detailed review is based on hands-on testing and expert analysis by Travis Holden, Technical Director at Polymer80Gun. Last updated: May 2026
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