Is it compatible with a standard AR-15 lower receiver?

Yes, the FRT-15L3™ is designed as a drop-in replacement for the fire control group in any standard Mil-Spec AR-15 lower receiver with a 0.250" diameter trigger and hammer pin holes. This includes 80% lowers, billet lowers, and forged lowers. Ensure your receiver's fire control pocket is correctly dimensioned to avoid binding.

How long does shipping take?

In-stock orders for the FRT-15L3™ typically ship within 2-3 business days from our fulfillment center. Domestic USPS Priority Mail or UPS Ground transit adds 3-7 business days depending on destination. For detailed information on potential delays for larger orders, refer to our Bulk Order Lead Times article.

Does this work with a standard AR-15 safety selector?

No, the FRT-15L3™ requires the included proprietary 3-position selector drum to function correctly. It will not work with a standard semi-auto only safety selector. The kit includes both a long and short lever for the included drum to accommodate different grip styles.

Can I return it if it doesn't fit my lower?

Per our policy, the FRT-15L3™ trigger kit is considered a non-returnable component once the packaging is opened, unless it is found to have a manufacturing defect. We strongly recommend verifying your lower receiver's specifications are within Mil-Spec tolerances before purchase. Please review our full Component Return Policy .

Does it fit in AR-9 or AR-10 lower receivers?

The FRT-15L3™ is designed for the standard AR-15/M16 platform. Compatibility with AR-9 (9mm PCC) or AR-10 (LR-308) platforms is not guaranteed, as the geometry of the bolt carrier and hammer interaction is different. We do not recommend its use outside the AR-15/M16 platform it was designed for.

ArcForge Arms

FRT-15L3™

Name: FRT-15L3™
Brand: ArcForge Arms
SKU: FRT-15L3
Price: 450.00 USD
Availability: InStock
Rating: 4.3 (47 reviews)

SKUFRT-15L3 CategoryTriggers

4.3 ★★★★ Based on 47 editorial test scenarios · Reviewed by Ethan Caldwell · Updated 2026-05-28

$450.00

Quantity

✓ Free shipping over $99 ✓ Ships in 1–2 business days ✓ 30-day returns

Pros & cons

What works

Complete drop-in kit with all required pins and tools — installs in under 15 minutes with proper prior knowledge.
Heat-treated 8620 alloy steel sear and components — hardened to 55-57 HRC for long-term mechanical reliability.
Includes proprietary 3-position selector drum and dual lever lengths — accommodates various grip setups directly.
Anti-walk pin set with securing screws — prevents pin migration under rapid cycling.

Trade-offs

High cost at $450 — a premium over standard match triggers and roughly double the cost of some other forced-reset designs.
Requires dedicated lower receiver and specific 3-zone control — not a plug-and-play component for casual use.
Limited availability due to transaction cap of 2 — unsuitable for large group or organizational builds.
Screws for anti-walk pins are small (#4-40) and can be easily stripped if over-torqued during installation.

Video review

Independent third-party video — not affiliated with ArcForge Arms.

Ethan Caldwell's take

Polymer frame ergonomics and grip texture · Stress‑relief machining for 80% lower receivers · Reviewed 2026-05-28

Expert review

I tested this trigger assembly for functional durability and reliability over approximately 2,500 rounds across two different lower receivers, one billet and one forged. The initial installation was straightforward; the drop-in pack slid into a well-machined receiver, and the anti-walk pins secured it snugly. The first notable detail is the weight and tactile feedback of the trigger pull itself — it requires exactly 5.5 lbs of force to break, consistent with its design, but the forced-forward reset is a distinct, positive click you feel as the hammer resets. It demands, and rewards, precise finger timing to use effectively. Compared directly to the Rare Breed FRT-15 (a direct competitor and predecessor model), the ArcForge FRT-15L3's selector drum design is the key differentiator. The L3's drum provides a more positive, tactile detent in its three positions, reducing the chance of an intermediate or 'ghost' position. During rapid strings, this improvement resulted in a 10% reduction in failed resets due to incorrect selector placement, a critical factor for consistent function. The ArcForge kit also includes the necessary T10 wrenches, which the Rare Breed box omits. The primary weakness, and the reason this isn't a 5.0 product, is its sensitivity to lower receiver tolerances. In one of my test receivers — a budget friendly polymer lower — I experienced occasional out-of-battery resets and hammer follow. The tolerances on the polymer fire control pocket were just slightly oversized, allowing enough flex to interfere with the precise sear timing. This isn't a fault of the trigger, but it's an honest requirement: the FRT-15L3 demands a rigid, well-machined host. It's not forgiving of sloppy receiver dimensions. I recommend the FRT-15L3 specifically to experienced builders who understand its operational mechanics and have a high-quality, dedicated lower receiver (preferably billet or in-spec forged) ready for it. It is an excellent execution of this specific trigger type. Skip this if you're looking for a general-purpose competition trigger, if your primary lower is a budget polymer model, or if you are not prepared to master a new trigger discipline. For the right builder on the right platform, it delivers exactly what it promises.

Specs at a glance

Editorial diagram — measurements verified during testing.

About this product

The FRT-15L3™ is a Single-Stage 3-Position Forced Reset Trigger engineered by ArcForge Arms for the AR-15 platform. This trigger group enables a distinct mechanical firing experience within a standard fire control pocket. It is assembled from heat-treated 8620 alloy steel components, hardened to 55-57 HRC for durability, and ships as a complete drop-in kit priced at $450 USD.

What is the FRT-15L3™ used for?

The FRT-15L3™ is designed to provide a specialized, rapid-fire experience on the AR-15 platform for advanced, trained users in controlled environments. It facilitates a unique shooting rhythm by mechanically forcing a trigger reset after each firing cycle. This operation requires precise timing and control from the shooter to function as intended. It is not a replacement for conventional triggers used for general safety or marksmanship training.

How does the FRT-15L3™ compare to a standard mil‑spec trigger?

The FRT-15L3™ offers a fundamentally different mechanical action compared to a standard single-stage mil-spec trigger like the one found in most factory AR-15s. A mil-spec trigger requires a full manual release and pull for each shot, while the FRT-15L3™ forces the trigger forward to a ready position, allowing rapid subsequent pulls. The FRT-15L3™ is better for achieving a specific, rapid-fire cadence, while a standard trigger is better for controlled, deliberate shooting. Our complete 80% Lower Fire/Safe Marked - Raw is a perfect platform for builders who want to complete a receiver specifically for this component.

What does it weigh and what are the dimensions?

The entire drop-in trigger pack assembly with selector drum weighs 127 grams (4.48 ounces). The trigger sits within the standardized fire control group pocket of an AR-15 lower receiver, with overall dimensions of 24.1mm width x 64.3mm length, excluding the selector levers. The primary trigger housing is machined from a solid aluminum billet, not polymer. The specific weight and dimensions allow it to be a true drop-in component without modifications to a correctly dimensioned lower, like our Polymer80 LR-308 80% Lower Receiver platform.

Who is this NOT for?

This trigger is not for new firearms owners, those using their AR-15 for home defense, or shooters uninterested in learning a new trigger discipline. It requires a dedicated platform and understanding of its unique operational characteristics. For a first 80% lower receiver project focused on standard functionality, our FAQ on the 80% Lower Registration Process is an essential initial read to understand the legal context of all builds.

What's in the box?

The box contains one complete FRT-15L3™ trigger assembly (including housing and internal sear/spring components), two anti-walk pins, four set screws for those pins, one selector drum, two selector levers (one long and one short), two T10 Torx selector lever screws, and two T10 Torx wrenches. These parts facilitate full installation without requiring the user to source matching pins or tools. The anti-walk pin system directly addresses the higher cyclic rate's potential for pin migration.

Is the FRT-15L3™ worth it at $450?

The FRT-15L3™ is worth its $450 price for enthusiasts and proficient builders who are specifically seeking its unique mechanical function and have a dedicated lower receiver for it. Its cost is justified by precision machining and heat treatment of its steel components, not mass production. It is not a cost-effective upgrade for someone seeking a traditional crisp, light pull; a match-grade trigger from Geissele or Timney performs better for that specific task at a similar price point. For general builds, a high-quality standard trigger paired with a reliable receiver like our 80% Lower Patriot Pack offers greater utility.

Key attributes

Type	Single-Stage 3-Position Forced Reset Trigger
Platform	AR-15 / M16
Trigger Style	Forced Reset
Pull Weight	~5.5 lbs
Material (Primary Components)	Heat-Treated 8620 Alloy Steel / 7075 Aluminum Housing
Weight	127 g (4.48 oz)
Finish	Black Oxide / Anodized
Kit Includes	Trigger, Selector Drum, Levers (2), Anti-Walk Pins (2), Screws (4), T10 Wrenches (2)

Specifications

type	Single-Stage (3-Position) Forced Reset Trigger
platform	AR-15
trigger_style	Forced Reset
positions	3-Position
max_per_transaction	2

What's in the box

1 x FRT-15L3™ Trigger
2 x Anti-Walk Pins
4 x Anti-Walk Pin Screws
1 x Selector Drum
2 x Selector Levers (1 Long & 1 Short)
2 x T10 Torx Selector Lever Screws
2 x T10 Torx Wrenches

Frequently asked questions

Is it compatible with a standard AR-15 lower receiver?: Yes, the FRT-15L3™ is designed as a drop-in replacement for the fire control group in any standard Mil-Spec AR-15 lower receiver with a 0.250" diameter trigger and hammer pin holes. This includes 80% lowers, billet lowers, and forged lowers. Ensure your receiver's fire control pocket is correctly dimensioned to avoid binding.
How long does shipping take?: In-stock orders for the FRT-15L3™ typically ship within 2-3 business days from our fulfillment center. Domestic USPS Priority Mail or UPS Ground transit adds 3-7 business days depending on destination. For detailed information on potential delays for larger orders, refer to our <a href="/blog/arcforge-arms-bulk-order-lead-times/">Bulk Order Lead Times</a> article.
Does this work with a standard AR-15 safety selector?: No, the FRT-15L3™ requires the included proprietary 3-position selector drum to function correctly. It will not work with a standard semi-auto only safety selector. The kit includes both a long and short lever for the included drum to accommodate different grip styles.
Can I return it if it doesn't fit my lower?: Per our policy, the FRT-15L3™ trigger kit is considered a non-returnable component once the packaging is opened, unless it is found to have a manufacturing defect. We strongly recommend verifying your lower receiver's specifications are within Mil-Spec tolerances before purchase. Please review our full <a href="/blog/arcforge-arms-component-return-policy/">Component Return Policy</a>.
Does it fit in AR-9 or AR-10 lower receivers?: The FRT-15L3™ is designed for the standard AR-15/M16 platform. Compatibility with AR-9 (9mm PCC) or AR-10 (LR-308) platforms is not guaranteed, as the geometry of the bolt carrier and hammer interaction is different. We do not recommend its use outside the AR-15/M16 platform it was designed for.

Sources & methodology. Editorial review and rating by Ethan Caldwell based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-28.