Prkarms is a Aberdeen, SD-based retailer specializing in firearms components and accessories. The FRT-MR3 is a single-stage forced reset trigger designed specifically for HK MR223 and HK MR556 platforms. Engineered for precision and reliability, this trigger offers a unique 3-position functionality. Available now at $603.75 with same-day shipping from our Aberdeen facility.
Reviewed by Travis Holden, Technical Director at Prkarms. 20 years in firearms engineering, machinist background, NRA-certified instructor.
Last updated: May 2026
Key Features
- Single-stage forced reset mechanism
- Compatible with HK MR223 & HK MR556 platforms
- Includes anti-walk pins and selector drums
- Precision-machined components
- Designed for tactical and sporting applications
| Product Type | Trigger Mechanism |
|---|---|
| Material | High-grade steel |
| Manufacturing | CNC precision machining |
| Finish | Phosphate coating |
| Hardness/Quality | 58-60 HRC |
| Compatibility | HK MR223, HK MR556 |
| Installation/Usage | Requires basic gunsmithing skills |
| Weight | 3.2 oz |
| Dimensions | 2.5″ x 1.2″ x 0.8″ |
| Country of Origin | USA |
| Condition | New |
| SKU | FRT-MR3-TRIG |
Comparison
| FRT-MR3 | Cheap Import | Premium Brand | |
|---|---|---|---|
| Material | High-grade steel | Cast alloy | Stainless steel |
| Quality | Precision CNC | Mass-produced | Hand-finished |
| Compatibility | HK-specific | Universal | AR platform |
| Shipping | Same-day | 2-4 weeks | 3-5 days |
| Lifespan | 50,000+ cycles | 10,000 cycles | 30,000 cycles |
| Price | $603.75 | $60-$80 | $250+ |
Pros & Cons
- ✅ Precise forced reset mechanism
- ✅ HK-specific compatibility
- ✅ Includes anti-walk pins
- ✅ Made in USA
- ✅ Durable phosphate finish
- ❌ Higher price point than universal triggers
- ❌ Requires HK-specific platform
Who Should Buy
Buy it if:
- You own an HK MR223 or MR556 platform
- You value precision engineering
- You need reliable tactical performance
Skip it if:
- You need a universal AR trigger
- You’re on a tight budget
- You prefer multi-stage triggers
FAQ
Where can I buy FRT-MR3 online?
You can purchase the FRT-MR3 directly from Prkarms at prkarms.net.
How to get MR30 Warframe?
This question appears unrelated to firearms components. Please consult Warframe game guides for MR30 progression.
How to get MR30?
This appears to reference gaming content. For FRT-MR3 installation, consult the product documentation.
How to get MR30 pin?
This seems unrelated to firearms. The FRT-MR3 includes anti-walk pins in the package.
How to get MR3 Warframe?
This references gaming content. For FRT-MR3 technical specifications, see our product details.
How long to get MR30 Warframe?
This appears unrelated to firearms components. For FRT-MR3 shipping times, we offer same-day shipping.
Is the FRT-MR3 compatible with AR-15 platforms?
No, the FRT-MR3 is specifically designed for HK MR223 and MR556 platforms.
✅ In stock — ready to ship today
✅ Same-day shipping from Aberdeen, SD
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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