FRT-MR3
About this product
Polymer80Central is a Logan, UT-based retailer specializing in firearms and accessories. The FRT-MR3 is a single-stage (3-position) forced reset trigger designed specifically for the HK MR223 & HK MR556. Engineered for precision and reliability, this trigger offers unmatched performance for serious gun enthusiasts. Available now for $603.75.
Reviewed by Cody Ramirez, E-Commerce Director at Polymer80Central. 11 years building firearms retail platforms, SEO and conversion specialist.
Last updated: May 2026
| Product Type | Forced Reset Trigger |
|---|---|
| Material | High-Grade Steel |
| Manufacturing | CNC Machined |
| Finish | Black Nitride |
| Hardness/Quality | 60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-In |
| Weight | 2.8 oz |
| Dimensions | 1.5 x 0.75 x 0.5 inches |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3 |
Key Features
- Single-stage design with 3-position functionality
- Includes anti-walk pins and screws for secure installation
- Comes with both A1 and A4 selector drums
- High-grade steel construction for durability
- Black nitride finish for corrosion resistance
Who It’s For
Buy it if: You own an HK MR223 or HK MR556 and want a reliable, high-performance trigger. This is for serious gun enthusiasts who demand precision and durability.
Skip it if: You’re looking for a budget option or need compatibility with other firearm models. Check out our Triggers category for alternatives.
Pros & Cons
- ✅ Precision-engineered for HK MR223 & HK MR556
- ✅ Includes all necessary installation components
- ✅ Durable high-grade steel construction
- ✅ Black nitride finish for corrosion resistance
- ✅ Easy drop-in installation
- ❌ Higher price point compared to budget options
- ❌ Limited compatibility with other firearm models
Comparison
| Feature | FRT-MR3 | Budget Option | Premium Brand |
|---|---|---|---|
| Material | High-Grade Steel | Aluminum | Steel |
| Quality | 60 HRC | 45 HRC | 58 HRC |
| Compatibility | HK MR223, HK MR556 | Various | Various |
| Shipping | Same-Day | 3-5 Days | Next-Day |
| Lifespan/Durability | High | Medium | High |
| Price | $603.75 | $60-$80 | $250+ |
FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 online at Polymer80Central (polymer80central.com).
How to get MR30 Warframe?
The MR30 Warframe is achieved by reaching Mastery Rank 30 in the game Warframe. This requires leveling up various equipment and completing missions.
How to get MR30?
To reach MR30, you need to gain mastery points by leveling up weapons, Warframes, and other equipment in Warframe.
How to get MR30 pin?
The MR30 pin is typically awarded by the game developers upon reaching Mastery Rank 30 in Warframe.
How to get MR3 Warframe?
MR3 is achieved by gaining mastery points through leveling up equipment and completing missions in Warframe.
How long to get MR30 Warframe?
The time to reach MR30 varies depending on your gameplay style and dedication. It can take several months to years of consistent play.
Is the FRT-MR3 compatible with other firearms?
The FRT-MR3 is specifically designed for HK MR223 and HK MR556 models. It is not compatible with other firearms.
✅ Same-day shipping from Logan, UT
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
Specs at a glance
What's in the box
- FRT-MR3