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Geissele
Overview
The Geissele Automatics SD-E trigger is a precision-engineered two-stage trigger designed for the AR-15 and AR-10 platforms. Its flat trigger bow provides a consistent pull, enhancing shooter control and accuracy, while the two-stage design allows for a clear distinction between stages, making it easier to achieve a precise break. This trigger is commonly found in builds featuring a rifle gas system and chambered in 5.56 NATO, catering to those looking for improved performance in both accuracy and feel during shooting.
Specifications
Available Merchants(9)
Prices checked
Price Alert
September 2026 on GunPartPicker
GEISSELE AUTOMATICS SD-E ranked #36 of the 228 triggers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #41 of the 468 triggers builders have added. Builds with this trigger are split between 5.56 NATO (53%) and 300 Blackout (21%), split between carbine-length (31%) and pistol-length (31%) gas systems, and mostly AR-15 (89%, then AR-10 11%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 7 of the 9 retailers we track have it in stock. Prices barely moved in September 2026, holding around $201.59, so there haven't been real sales lately. Buying today, the lowest price is $211.15 at KY Gun Company.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
Ballistic Advantage Stripped AR-15 Enhanced Lower Receiver
Magpul MOE K2 Grip Polymer Gray
PSA GEN3 PA10 20" Rifle-Length .308 WIN 1:10 Stainless Steel 15" Lightweight M-LOK Upper - With BCG & CH
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
CMMG AR15 Ambi Mag Catch, Black - 55AFF6E
Radian Weapons Talon Ambidextrous Safety Selector 2-Lever KIT - Radian Grey
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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