USM Geissele Super-Semi Automatic (SSA)

Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger for AR-15

The Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger is a precision two-stage trigger for the AR-15 platform, designed by Geissele Automatics for shooters who demand high accuracy, trigger control, and reliability. The SSA-E is an enhanced version of the legendary SSA trigger with reduced force on the first and second stages, providing a smoother trigger pull and a crisper break.

The SSA-E uses a two-stage trigger design. The first stage has a smooth stroke to a clearly felt second stage, after which there is a clean and predictable break. This design makes the trigger the optimal choice for high-precision shooting, competitions, where accuracy and repeatability are important.

The design is non-adjustable and is made in a Drop-In format, compatible with standard AR-15 lower receivers. Geissele positions the SSA-E as a trigger that combines improved trigger control with the reliability proven on the basis of the combat-proven two-stage SSA mechanism.

Main characteristics:

• Model: Super Semi-Automatic Enhanced (SSA-E)
• Manufacturer: Geissele Automatics
• Type: Two-Stage trigger mechanism
• Trigger type: radial
• 1st stage force: ≈ 1.04–1.36 kg
• 2nd stage force: ≈ 0.54–0.79 kg
• Total trigger force: ≈ 1.59–2.15 kg
• Compatibility: AR-15 Lower Receiver
• Unregulated design
• Material: tool steel
• Purpose: precision shooting, sports shooting
• Country of manufacture: USA

Advantages of the model:

• Two-stage trigger with smooth first stage and crisp breakaway
• Reduced descent effort compared to the SSA model
• Non-adjustable design for stable operation
• Compatible with standard AR-15 Mil-Spec Lower Receivers
• The optimal choice for high-precision and sports shooting