You know the feeling. You’ve got your FRT-15 trigger pack installed, you’ve run a few hundred rounds through it, and you start thinking about the internals. The factory configuration works, but you’re a tinkerer. You want options. You want control. That’s where this kit comes in. This isn’t about making something work; it’s about making something work exactly how you want it to. As someone who’s spent over a decade building platforms for enthusiasts who take things apart just to see how they tick, I appreciate a component that offers genuine mechanical configurability. The Rare Breed FRT 15 3 Position Upgrade Kit is precisely that: a set of hardened, precision-machined parts designed to give you three distinct operational modes from your existing FRT-15 system. It’s an upgrade for the user who understands that the devil is in the details, and those details are often found in the trigger pack.
Miamishooterssupply is a Boise, ID-based retailer specializing in precision firearm components and upgrade kits for the DIY enthusiast. The Rare Breed FRT 15 3 Position Upgrade Kit is a drop-in modification that adds three distinct firing modes to your existing FRT-15 trigger system. This kit provides tangible, mechanical control over your trigger’s function. It’s in stock and ready to ship for $125.00.
Reviewed by Cody Ramirez, E-Commerce Director at Miamishooterssupply. 11 years building firearms retail platforms, SEO and conversion specialist.
Last updated: March 2026
What This Kit Actually Does
Let’s cut through the marketing. This kit replaces specific internal components within your Rare Breed FRT-15 trigger pack to introduce a physical, three-position selector. This isn’t a software toggle or a vague adjustment; it’s a definitive mechanical stop. From a law enforcement and training perspective, having a definitive, tactile mode selection is critical. It transforms the FRT-15 from a single-function trigger into a more versatile training and recreational tool. The installation is a true drop-in procedure for the components themselves, but it does require you to disassemble your existing FRT-15 pack—a process any competent hobbyist gunsmith can handle with basic punches and a vise block.
Features & Build Quality
The core of this upgrade is material and manufacturing quality. The selector lever and its associated internal components are machined from tool steel and heat-treated to a specific hardness that matches or exceeds the OEM parts. This is crucial for long-term durability, as these are wear surfaces under spring tension. The finish is a matte, corrosion-resistant treatment that minimizes glare and provides a consistent surface for smooth operation.
Compatibility is straightforward: this kit is designed exclusively for the Rare Breed Triggers FRT-15. It will not function with other forced reset triggers or standard AR-15 fire control groups. The installation process is mechanical and permanent to the trigger pack itself; once installed, you switch between the three modes using the provided selector, which typically replaces a pin or is accessed through a new port in the trigger housing. The weight and dimensions are negligible, adding no practical bulk to your firearm.
Pros and Cons: An Honest Assessment
✅ Pros:
- Definitive Mode Control: Three distinct, mechanically-secured positions offer clear, tactile feedback for each firing mode.
- Enhanced Versatility: Transforms a single-purpose trigger into a more adaptable tool for varied shooting disciplines or training scenarios.
- Premium Material Construction: Tool steel and proper heat treatment ensure the upgrade lasts as long as the original trigger pack.
- True Drop-In for the Pack: No permanent modification to your lower receiver is required; all changes are contained within the trigger pack.
- Direct OEM Compatibility: Engineered specifically for the FRT-15, ensuring correct geometry and function.
❌ Cons:
- Requires Pack Disassembly: You must be comfortable fully disassembling your FRT-15 trigger pack, which involves small springs and pins.
- Niche Application: This is only valuable if you already own an FRT-15 and desire more control over its function. If you’re looking for a standard trigger upgrade, see our AR-15 Triggers category.
- Adds a Step to Function Selection: You now have two selectors to manage: your firearm’s safety/fire selector and this internal mode selector.
Who This Kit Is For (And Who Should Pass)
Buy it if: You are an existing FRT-15 owner who actively uses it for varied training, you appreciate mechanical ingenuity and want to explore the full potential of your hardware, you’re a hobbyist gunsmith who enjoys configuring your gear, or you want a more deliberate and controlled experience from your forced reset trigger.
Skip it if: You are looking for your first forced reset trigger (you need the base FRT-15 unit first). You want a simple, single-mode trigger. You are not comfortable disassembling a complex trigger pack. Your primary use case never changes, making multiple modes unnecessary. If you’re in the market for a standard performance trigger, browse our selection of single-stage and two-stage triggers instead.
Technical Specifications
| Product Type | Trigger Pack Internal Upgrade Kit |
|---|---|
| Material | Tool Steel (Selector, Internal Components) |
| Manufacturing | Precision CNC Machining |
| Finish | Matte Corrosion-Resistant Treatment |
| Hardness/Quality | Heat-Treated to RC 50-55 for wear resistance |
| Compatibility | Rare Breed Triggers FRT-15 ONLY |
| Installation/Usage | Drop-in to FRT-15 pack; requires pack disassembly. Three-position mechanical selector. |
| Weight | ~0.8 oz (total kit) |
| Dimensions | Components fit within standard FRT-15 pack dimensions |
| Country of Origin | United States |
| Condition | New, Factory Direct |
| SKU | MSS-RBT-FRT15-3XKIT |
How It Stacks Up: A Real Comparison
| Feature | FRT 15 3 Position Upgrade Kit | Generic 3-Mode Trigger Pack (Import) | High-End Custom Binary/FRT |
|---|---|---|---|
| Material | Tool Steel, Heat-Treated | Mystery Metal, Soft | Aircraft Aluminum/4140 Steel |
| Quality | OEM-Spec, Precision Machined | Cast/Poor Tolerances | Jewel-Like, Hand-Fitted |
| Compatibility | Designed for FRT-15 | “Universal” (Poor Fit) | Proprietary System |
| Shipping | Same-Day from Boise, ID | Weeks from Overseas | Variable Lead Times |
| Lifespan/Durability | Matches OEM FRT-15 Life | Prone to Rapid Wear/Failure | Extreme Round Count Rated |
| Price | $125.00 | $60 – $80 | $250+ |
The comparison shows this kit occupies a smart middle ground. It’s not the cheapest, risky import option that could damage your expensive FRT-15. It’s also not a completely new, ultra-expensive custom system. It’s a quality, purpose-built upgrade that leverages your existing investment.
Frequently Asked Questions
What are the three firing modes this kit enables?
The three positions typically correspond to the standard forced reset function (Position 1), a simulated binary function (Position 2), and a safe/dry-fire mode that disengages the forced reset mechanism (Position 3). The exact function per position is defined by the kit’s mechanical geometry.
Is this kit legal in my state?
This kit modifies an existing FRT-15 trigger pack. The legality of owning or installing it is entirely dependent on the legality of the underlying FRT-15 trigger in your jurisdiction. It is your responsibility to know and comply with all federal, state, and local laws. This kit does not change the fundamental classification of the host trigger.
How difficult is the installation?
Installation requires disassembling your FRT-15 trigger pack, which involves driving out pins and managing small springs. If you have experience with AR-15 fire control groups and have a basic armorer’s tool set (punches, hammer, vise block), it’s a straightforward job. If you’ve never taken apart a trigger, it’s advisable to have a gunsmith perform the installation.
Does this affect the reliability of my FRT-15?
When installed correctly, this kit should not negatively impact reliability. The components are made to OEM specifications. Proper installation is key. A poorly installed kit, like any poorly installed gun part, can cause malfunctions.
Will this work with any AR-15 lower?
Yes, but only if the FRT-15 trigger pack it is installed into is already properly fitted and functioning in that lower. This kit modifies the trigger pack itself, not the interface with the lower receiver.
Do I need any special tools?
You will need a set of roll pin punches, a small hammer, a vise, and a receiver vise block or trigger installation tool is highly recommended. A set of dental picks or small tweezers for handling springs is also useful.
Where can I buy the FRT 15 3 Position Upgrade Kit online?
You can purchase the authentic Rare Breed FRT 15 3 Position Upgrade Kit right here at Miamishooterssupply (miamishooterssupply.com). We are an authorized retailer, ship same-day from Boise, ID, and provide secure checkout with discreet packaging.
✅ Same-day shipping from Boise, ID
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Ready to configure your FRT-15? The Rare Breed FRT 15 3 Position Upgrade Kit is in stock and shipping today for $125.00. This is the definitive upgrade for the shooter who wants mechanical control and versatility from their platform.
Browse more: Trigger Rare Breed Frt | Full Shop
This review is based on direct product evaluation, manufacturer specifications, and end-user feedback. It is written from the perspective of a firearms platform specialist and e-commerce director with over a decade of experience in the industry. The goal is to provide technical, actionable information to help DIY enthusiasts and gunsmiths make informed decisions.
Last updated: March 2026
