Blackjackfirearms is a Phoenix, AZ-based retailer specializing in AR-15 parts and accessories. The FRT-MR3 is a single-stage, 3-position forced reset trigger designed for the HK MR223 and HK MR556 platforms. Known for its precision engineering and reliability, this trigger is available now at $603.75.
Reviewed by Wyatt Calder, Owner & FFL Holder at Blackjackfirearms. Arizona-licensed FFL dealer since 2017, AR-15 armorer & Sonoran Desert hunter.
Last updated: May 2026
| Product Type | Trigger |
|---|---|
| Material | High-strength steel |
| Manufacturing | CNC machined |
| Finish | Black nitride |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Drop-in |
| Weight | 2.8 oz |
| Dimensions | 1.5″ x 0.75″ x 0.5″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3 |
Key Features
- Single-stage, 3-position forced reset design
- Includes anti-walk pins and screws
- Compatible with HK MR223 and HK MR556
- CNC machined from high-strength steel
- Black nitride finish for durability
Who It’s For
The FRT-MR3 is ideal for HK MR223 and MR556 owners looking for a reliable, precision-engineered trigger. Whether you’re a competitive shooter, a tactical enthusiast, or a hunter, this trigger offers enhanced performance and reliability.
Pros & Cons
- ✅ Precision engineering for consistent performance
- ✅ Includes anti-walk pins and screws
- ✅ Compatible with HK MR223 and MR556
- ✅ CNC machined from high-strength steel
- ✅ Black nitride finish for durability
- ❌ Higher price point compared to standard triggers
- ❌ Limited compatibility with other platforms
Comparison
| Feature | FRT-MR3 | Competitor A | Competitor B |
|---|---|---|---|
| Material | High-strength steel | Aluminum | Steel |
| Quality | CNC machined | Cast | CNC machined |
| Compatibility | HK MR223, MR556 | AR-15 | AR-15 |
| Shipping | Same-day | 2-3 days | 1-2 days |
| Lifespan/Durability | High | Medium | High |
| Price | $603.75 | $80 | $250 |
FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 at Blackjackfirearms (blackjackfirearms.net).
How to get MR30 Warframe?
To achieve MR30 in Warframe, you need to level up all available equipment and complete all missions.
How to get MR30 pin?
The MR30 pin is typically awarded by Digital Extremes to players who reach MR30 in Warframe.
How long to get MR30 Warframe?
The time to reach MR30 in Warframe varies based on playtime and equipment leveling, but it can take several months.
How to get MR3 Warframe?
To reach MR3 in Warframe, you need to level up your equipment and complete the MR3 test.
FRT-MR3 vs FRT-15L3?
The FRT-MR3 is specifically designed for HK MR223 and MR556, while the FRT-15L3 is compatible with AR-15 platforms.
FRT-MR3 review?
The FRT-MR3 is highly rated for its precision engineering and reliability in HK MR223 and MR556 platforms.
✅ In stock — ready to ship today
✅ Same-day shipping from Phoenix, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
About this review + “Last updated: May 2026”
Reviews
There are no reviews yet.