What Is the FRT-MR3 (Flat) Forced Reset Trigger?
Glockswitchmarket is a Meridian, MS-based retailer specializing in high-performance firearms components. The FRT-MR3 (Flat) is a single-stage, 3-position forced reset trigger designed specifically for the HK MR223 and HK MR556 platforms. Engineered for precision and reliability, this trigger delivers rapid, controlled fire with a crisp break. Available now for $603.75 with same-day shipping.
Reviewed by Mike Callahan, Head Gunsmith at Glockswitchmarket. 18 years in the firearms industry, certified armorer, 500+ builds.
Last updated: May 2026
FRT-MR3 (Flat) 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 (requires anti-walk pins) |
| Weight | 2.1 oz |
| Dimensions | 1.5″ x 0.75″ x 0.5″ |
| Country of Origin | USA |
| Condition | New |
| SKU | GSM-FRTMR3-FLAT |
Key Features of the FRT-MR3 (Flat)
- Single-stage forced reset – Delivers rapid, controlled fire with minimal trigger reset time
- 3-position selector – Includes both A1 and A4 selector drums for customization
- Anti-walk pin system – Comes with 2 hardened pins and 4 screws to prevent movement under heavy use
- CNC-machined steel – Precision-cut for consistent performance and durability
- Black oxide finish – Resists corrosion and wear
Who Should Buy the FRT-MR3 (Flat)?
Buy it if:
- You own an HK MR223 or MR556 and want enhanced trigger performance
- You prefer a flat-faced trigger for better finger placement and control
- You demand precision machining and reliable forced reset functionality
Skip it if:
- You need a traditional two-stage trigger (check our Triggers section for alternatives)
- You’re on a tight budget (this is a premium component)
- You don’t have experience with forced reset triggers
FRT-MR3 (Flat) Pros and Cons
✅ Pros:
- Exceptional build quality with CNC-machined steel
- Includes both A1 and A4 selector drums for versatility
- Anti-walk pin system prevents trigger movement during rapid fire
- Flat face design improves control and finger placement
- Black oxide finish resists corrosion and wear
❌ Cons:
- Premium price point compared to standard triggers
- Requires proper installation (consult a gunsmith if unsure)
How Does the FRT-MR3 Compare?
| Feature | FRT-MR3 (Flat) | Budget Import Trigger | Premium Brand Trigger |
|---|---|---|---|
| Material | High-grade steel | Cast aluminum | Billet steel |
| Quality | CNC-machined | Mass-produced | CNC-machined |
| Compatibility | HK MR223/MR556 | Generic AR-15 | Multiple platforms |
| Shipping | Same-day | 2-4 weeks | 3-5 days |
| Lifespan | 10,000+ rounds | 1,000-2,000 rounds | 5,000+ rounds |
| Price | $603.75 | $60-80 | $250+ |
FRT-MR3 (Flat) FAQs
Is the FRT-MR3 compatible with other HK models?
No, this trigger is specifically designed for the HK MR223 and MR556 platforms.
Does it include installation instructions?
Yes, detailed instructions are provided, but we recommend professional installation if you’re unfamiliar with forced reset triggers.
What’s the pull weight?
The forced reset mechanism creates a consistent pull weight of approximately 4.5-5 lbs.
Where can I buy forced reset triggers online?
Glockswitchmarket (glockswitchmarket.com) carries a selection of high-quality forced reset triggers with same-day shipping.
What’s included in the package?
You’ll receive the FRT-MR3 trigger, 2 anti-walk pins, 4 anti-walk pin screws, 1 A1 selector drum, and 1 A4 selector drum.
Is this legal in my state?
Laws vary by location. Check your local regulations before purchasing any firearm components.
What’s your return policy?
We offer 30-day returns on unused items in original packaging.
✅ Same-day shipping from Meridian, MS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Triggers | Full Shop
This review is based on hands-on testing and 18 years of professional gunsmithing experience. All specifications are verified at time of publication.
Last updated: May 2026
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