Geissele Super Dynamic Combat SD-C Two-Stage AR-15 Trigger - 05-165

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Geissele Automatics® Super Dynamic Combat (SD-C) Trigger – Flat Bow – 05-165

The Geissele Super Dynamic Combat (SD-C) Trigger (05-165) is a premier duty-grade, two-stage upgrade engineered for hard-use combat, tactical law enforcement, and home defense applications. Fusing the internal mechanics of Geissele's legendary Combat Trigger (SSA) with a modern, high-performance straight shoe, the SD-C provides a crisp, predictable break that vastly improves precision under stress. The defining feature of this model (854014005069) is its flat trigger bow, which gives the shooter a more consistent mechanical advantage and allows the finger to sit naturally lower on the shoe, making the pull feel lighter and more controllable than a standard curved face.

Built for maximum defense-ready security, the SD-C is a robust, non-adjustable system featuring a total pull weight of approximately 4.5 lbs (2.5 lbs on the first stage, 2.0 lbs on the second). This explicit two-stage profile provides a safe, distinct "wall" that acts as a physical fail-safe against premature firing during high-adrenaline scenarios, while breaking like a clean carrot with near-zero over-travel. Wire-EDM cut from specialized heavy-duty tool steel and finished in a slick, low-friction coating, the SD-C features full-power hammer springs to guarantee 100% reliable ignition on hard military primers. It is a drop-in upgrade for standard AR-15 and AR-10 platforms, providing match-grade accuracy wrapped in an absolute duty-safe package.

Includes: (1) Geissele SD-C Two-Stage Trigger Assembly, (2) Trigger/Hammer Pins, Go-Juice Lubricant, and Installation Instructions.

Key Features

• Flat Bow Geometry: Modern straight-face trigger shoe enhances leverage, reduces perceived pull weight, and ensures repeatable finger placement.
• Combat-Safe Two-Stage Design: Distinct 2.5-lb take-up followed by a crisp 2.0-lb second stage ensures maximum safety in tactical environments.
• "Carrot-Break" Sensation: Precision-ground sears break cleanly with zero mush or creep, dramatically tightening down down-range shot groups.
• Full-Power Hammer Spring: Engineered to strike with military-spec velocity, ensuring flawless ignition of hard primers across bulk surplus and duty ammo.
• Wire-EDM Tool Steel Construction: Manufactured from premium high-tensile alloys to resist dimensional wear and hold crisp tolerances over thousands of rounds.
• Broad Platform Compatibility: Drop-in ready for mil-spec AR-15, M4, AR-10, and SR-25 lower receivers using standard small pins (.154").

Product Specifications

• Brand: Geissele Automatics®
• Model: Super Dynamic Combat (SD-C)
• SKU / MPN: 05-165
• Platform: AR-15 / AR-10 / M4 / LR-308 / SR-25
• Trigger Type: Two-Stage
• 1st Stage Pull Weight: 2.5 lbs
• 2nd Stage Pull Weight: 2.0 lbs
• Total Pull Weight: 4.5 lbs
• Trigger Face: Modern Flat Bow
• Pin Size: Mil-Spec Small Pin (.154")
• Material: Wire-EDM Cut Tool Steel
• UPC: 854014005069