The Geissele Super Dynamic 3-Gun Trigger, SD-3G (brand part no. 05-166), builds on Geissele’s S3G design with a shortened pull length and a lightning-quick reset, giving it a hybrid feel that sits between a traditional two-stage and single-stage trigger. Geissele retains the safety and robustness of a two-stage combat trigger while tuning the pull for speed, and finishes it with a flat trigger bow that reduces perceived pull weight and sharpens tactile feedback to the shooter. Among AR triggers, the SD-3G is built specifically for 3-Gun competitors who need a fast, consistent, semi-auto-only trigger under time pressure.

Key Specifications

• It is built on the S3G platform in Geissele’s Super Dynamic line.
• The pull has a hybrid two-stage/single-stage feel, with a shortened pull length.
• The reset is lightning-quick for fast, repeated follow-up shots.
• It retains the safety and robustness of a two-stage combat trigger.
• The trigger bow is flat, reducing perceived pull weight.
• The flat bow also improves tactile feedback to the shooter.
• The trigger measures 5.55 inches in length.
• It is a semi-auto-only design built for competition use.

Frequently Asked Questions

Is the SD-3G a single-stage or two-stage trigger? It’s a hybrid — a shortened two-stage-style pull with a single-stage-like feel and a very fast reset.

What is the SD-3G designed for? Geissele built it specifically for 3-Gun competition, where speed and a consistent reset matter as much as accuracy.

Is this a drop-in AR trigger? Yes, it’s a complete semi-auto AR trigger assembly designed for standard AR-15 lower receivers.

Buy the Geissele SD-3G AR Trigger

A fast, hybrid-feel trigger built for the demands of 3-Gun competition is exactly what the SD-3G delivers. Order it from our Lubbock, Texas gun shop for fast shipping.