Name: Geissele Automatics G2S Two-Stage AR-15 Trigger 4.5 lb Small Pin Curved - 05-145
Brand: Geissele Automatics
SKU: 05-145
Price: 165 USD
Availability: InStock

Geissele Automatics G2S Two-Stage AR-15 Trigger 4.5 lb Small Pin Curved - 05-145

$165.00

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Product Description

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Geissele Automatics G2S Two-Stage 4.5 lb Mil-Spec Pin AR-15 / AR-10 Trigger - 05-145

Product Description

Upgrading a factory modern sporting rifle frequently uncovers an immediate tactical bottleneck: the standard single-stage mil-spec trigger group. Standard factory triggers are notorious for heavy, grinding pull weights exceeding seven pounds, extensive stacking creep, and a unpredictable, muddy break that severely limits downrange accuracy during rapid transitions or precision tracking. Many shooters long for the crisp, legendary performance of Geissele’s battle-proven Super Semi-Automatic (SSA) trigger but find themselves limited by strict project budget constraints. The Geissele 2 Stage (G2S) Trigger completely eliminates this barrier, packaging identical internal geometry, pull dynamics, and structural performance into a streamlined, cost-effective design that refuses to compromise on field dependability.

The engineering brilliance of the G2S lies in its precision manufacturing adaptation. While it is wire-EDM cut from the exact same high-strength, combat-grade tool steel as its premium siblings, Geissele optimized the cost by switching to efficient batch-processing methods and removing cosmetic laser-engraved markings. This specific configuration features a traditional M4 curved trigger bow that sets a natural physical index for your finger pad across any tactical stance. The non-adjustable two-stage profile provides a total pull weight range of 4.25 to 4.75 pounds, split perfectly between a smooth, uniform 3-pound first-stage take-up and a crisp, light 1.5-pound second-stage wall that breaks cleanly with zero perceived creep.

In high-speed defensive or long-range hunting applications, this hybrid approach gives operators the best of both worlds. The light, predictable first stage provides a deliberate safety cushion during high-stress movement or gloved operation, while the definitive second-stage wall permits precise target placement at extended distances. The full-power hammer spring guarantees swift lock times and ensures absolute priming ignition across all ammunition types, including tough military-surplus 5.56 NATO and 7.62x51mm primers. Drop this premium upgrade into your lower receiver to secure a match-grade firing sequence that enhances tracking recovery and split-second responsiveness.

*Armorer Bench Notes & Technical Maintenance Guidance: The Geissele G2S is configured strictly for standard mil-spec small-pin lower receivers utilizing a 0.154-inch pin diameter; it will not fit legacy large-pin (.169") Colt lower receiver variations. A key physical differentiator of the G2S is its unique hammer pin retention setup: unlike the SSA which utilizes an internal J-pin inside the hammer core, the G2S relies on a specialized external wire clip that snaps over the hammer pin during assembly to lock it in place. Before pinning the fire control components into the receiver frame, apply a moderate coating of the included Geissele trigger grease directly to the primary sear nose, the disconnector hook, and the trigger/hammer axis pin channels. Avoid pouring liquid aerosol cleaners or thin spray lubricants into the trigger pocket, as they rinse away the heavy specialized grease needed to maintain that signature crisp break.

Key Features

Identical SSA Engagement Profile: Shares the exact internal sear geometry and trigger bow dimensions as the legendary SSA, providing world-class performance at an accessible value tier.
Crisp 4.5 lb Total Pull Weight: Configured with a predictable 2.75–3.0 lb first stage and a sharp 1.5–1.75 lb second-stage break to maximize long-range accuracy.
EDM Wire-Cut Tool Steel: Machined entirely from exceptional quality, heavy-duty tool steel forgings to ensure the sear surfaces never round off or shift timing over high-volume round counts.
Full-Power Hammer Spring: Engineered to maximize driving force against the firing pin, ensuring absolute reliability with hard primer varieties.
Traditional M4 Curved Bow: Provides a familiar tactile feel that supports repeatable finger placement and seamless transition from standard mil-spec configurations.