The Geissele Super Semi-Automatic Trigger (SSA) (brand part number 05-101) is a two-stage drop-in trigger built by Geissele Automatics for AR-platform rifles. The SSA is one of Geissele’s most established trigger designs, built around a two-stage pull that gives a defined take-up before a clean, repeatable break — a combination that has made it a mainstay on precision and duty AR builds. The self-contained housing measures roughly 5.55 inches, sized to fit a standard mil-spec fire control pocket, and it installs directly into a standard AR-15 lower without additional fitting.

Key Specifications

• Uses a two-stage trigger design.
• Part of Geissele’s Super Semi-Automatic (SSA) trigger lineup.
• Housing measures approximately 5.55 inches, sized for a standard AR lower.
• Installs as a drop-in unit with no additional fitting.
• Built for AR-platform rifles.

Frequently Asked Questions

Is this a single-stage or two-stage trigger? Two-stage, giving a defined take-up before a clean break.

Is this a drop-in trigger? Yes, the SSA installs directly into a standard AR-15 lower receiver.

Buy the Geissele SSA Trigger

Add one of Geissele’s most proven two-stage triggers to your AR-platform rifle. Order the SSA from our Geissele Automatics lineup of AR triggers for fast, reliable shipping from our Lubbock, Texas gun shop.