Buy FRT-15L3™

You’re looking at the FRT-15L3™. It’s not a trigger you buy on a whim. It’s a piece of engineering for the shooter who understands the relationship between the sear, the hammer, and the disconnector. This is for the builder who’s already thinking about spring weights and bolt carrier timing. From my bench in Boise, I’ve seen a lot of parts come and go. This one stands out because it demands you understand your platform. It’s a mechanical conversation between you and your rifle.

Miamishooterssupply is a Boise, ID-based retailer specializing in precision firearms components and DIY gunsmithing parts. The FRT-15L3™ is a forced reset trigger system designed for the AR-15 platform. Its operation is based on a specific mechanical interaction with the bolt carrier group. This unit is in stock and ready to ship for $450.00.

Let’s get technical. The FRT-15L3™ isn’t a binary or a drop-in cassette. It’s a complete fire control group replacement that utilizes a proprietary sear and hammer design. The core principle is forced reset: as the bolt carrier group travels forward after firing, a specific internal lobe contacts the trigger mechanism, physically pushing the trigger forward to its reset position. This mechanical action, not just spring pressure, is what defines its function. It requires a consistent, full-stroke pull for each shot. Understanding this mechanical cycle is crucial for reliable operation and proper installation.

The build quality is immediately apparent. The components are machined from solid tool steel, not MIM or cast metal. The finish is a uniform, matte black oxide that provides solid corrosion resistance without adding thickness to critical engagement surfaces. The hardness rating on the sear and hammer engagement points is critical; this unit is heat-treated to a Rockwell C scale that prioritizes wear resistance over extreme brittleness, aiming for a long service life under high-cycle use. The springs are specifically weighted for this system—using a standard hammer spring can lead to malfunctions.

Compatibility is your first checkpoint. The FRT-15L3™ is designed for mil-spec AR-15 lower receivers. It generally works with direct impingement systems and some piston-driven uppers, but carrier geometry is key. Certain bolt carriers with unique or extended skirts may not provide the necessary clearance or contact point. It functions with a standard AR-15 buffer and spring, but as many YouTube channels have demonstrated, a heavier buffer can aid in reliable cycling by ensuring the bolt carrier has enough inertia to fully actuate the reset mechanism. This isn’t a ‘plug and play’ part for every build; it’s a system component that works best in a tuned rifle.

FRT-15L3™ Features & Operational Details

Installation requires a basic understanding of the AR-15 fire control group. You’ll need a punch set and a vise block for your lower receiver is recommended. The process mirrors a standard trigger swap, but attention to detail is paramount. The disconnector spring orientation and the seating of the proprietary safety selector plate must be correct. A common point of failure I’ve seen from an armorer’s perspective is improper pin alignment or a slightly out-of-spec lower receiver pin hole causing drag.

From a law enforcement perspective, the training implications of a forced reset system are distinct. The trigger pull remains consistent shot-to-shot, unlike some adaptive triggers that change characteristics. This can be valuable for developing a specific, repeatable trigger press under stress. However, it absolutely requires dedicated practice to master the rhythm and maintain control. It changes the fundamental operation of the rifle, which demands responsible handling and training.

Durability comes from its material choice and design. The tool steel construction handles the repeated impact of the reset action far better than softer metals. The design spreads the wear across multiple contact surfaces, not just a single shear point. With proper maintenance—keeping it clean and lightly lubricated on the pivot points—it should withstand tens of thousands of cycles. It’s a component built for high-volume shooters, not occasional range use.

Pros and Cons of the FRT-15L3™

Pros:

• ✅ Machined from solid tool steel for maximum durability and wear resistance.
• ✅ Provides a consistent, mechanical forced reset action for a predictable trigger cycle.
• ✅ Designed as a complete FCG replacement for proper integration and safety.
• ✅ High-quality, heat-treated finish protects against corrosion without interfering with tolerances.
• ✅ Comes with all necessary proprietary springs and hardware for correct function.

Cons:

• ❌ Requires a compatible bolt carrier group and a properly tuned rifle for reliable function. Not all uppers will run it flawlessly.
• ❌ Demands a specific, disciplined trigger pull technique. A short-stroke or hesitant pull will cause a malfunction.
• ❌ Higher price point reflects its manufacturing and material cost. For a simpler trigger upgrade, see our AR-15 Triggers category.

Who Should (and Shouldn’t) Buy the FRT-15L3™

Buy it if: You are an experienced AR-15 builder who enjoys mechanical tuning. You understand fire control group geometry and are willing to diagnose cycling issues. You’re a high-volume shooter looking for a durable, mechanically unique trigger system and you prioritize a consistent reset feel. You accept that this is a specialized component that may require adjusting your buffer system or bolt carrier.

Skip it if: You want a simple, drop-in performance trigger for your first build. You need a trigger that will work with any upper receiver without any tuning. Your primary goal is the lightest possible pull weight. You are not comfortable detail-stripping your lower receiver. For more traditional performance options, browse our curated trigger selection.

FRT-15L3™ Technical Specifications

How It Stacks Up: FRT-15L3™ vs. Other Triggers

Feature	FRT-15L3™	Budget Forced Reset (~$60-80)	Premium Binary Trigger (~$250+)
Material	CNC Tool Steel	Cast Metal / MIM	Machined Steel or Aluminum
Quality	Precision machined, heat-treated	Variable, often softer metals	High, but different design intent
Compatibility	Requires specific BCG & tuning	Often poor, high failure rate	Generally high, drop-in design
Shipping	US-made, ships from Boise, ID	Typically import, long lead times	US-made, various distributors
Lifespan/Durability	Designed for high-cycle use	Prone to rapid wear or breakage	Good, but different wear patterns
Price	$450.00	$60 – $80	$250 – $400

The comparison shows the FRT-15L3™ occupies a specific niche. It’s not competing with cheap imports that sacrifice material integrity, nor is it a direct alternative to a binary trigger, which offers a different firing mode entirely. You’re paying for robust materials, precise manufacturing, and a specific mechanical function that demands more from the shooter and the host rifle.

Frequently Asked Questions

Ready to Order Your FRT-15L3™

If you’ve read this far, you understand what the FRT-15L3™ is and what it requires. This is a component for the informed builder, the tinkerer, the shooter who values mechanical precision. It’s available now, shipping from our warehouse in Boise. Add it to your cart if your build is ready for it.

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