The Geissele SSA-E trigger, short for Super Semi-Automatic Enhanced (Geissele part no. 05-160), is a two-stage drop-in trigger for AR-15 and AR-10 rifles. It is built on the chassis of the Geissele SSA, with reduced first- and second-stage pull weights that give a smooth, light take-up and a crisp, candy cane-like break. Geissele Automatics aims it at precision rifles of the Squad Designated Marksman type, where accuracy and reliability both count. It is the semi-automatic-only version of Geissele’s two-stage combat trigger and keeps the classic curved M4 bow. Geissele points buyers who want a flat bow to the SD-E.

Key Specifications

• The trigger is two-stage, so you take up slack in the first stage before the second stage breaks.
• First-stage pull weight is 2.0 to 2.5 lb, a light, smooth take-up.
• Second-stage pull weight is 0.9 to 1.3 lb, which gives the crisp break.
• Total pull weight is 2.9 to 3.8 lb, and Geissele notes that all weights are approximate.
• The trigger bow is M4 curved, the classic style, rather than flat.
• The trigger is non-adjustable, so the pull is set at the factory.
• It uses mil-spec pin sizes, so it works with standard mil-spec pins.
• The platform is AR15/AR10, set up as a drop-in replacement for the fire control group.
• Operation is semi-automatic only, the intended use for the SSA-E.
• It is built on the chassis of the Geissele SSA, which carries over that trigger’s robustness and reliability.

Frequently Asked Questions

Will the SSA-E fit a Sig MPX/MCX or a pistol caliber carbine AR? No. Geissele designs its AR15 triggers for mil-spec AR15/M4 carbine rifles and says they are not compatible with the Sig MPX/MCX or with pistol caliber carbine AR15/M4 variants, and that using them in those platforms voids the warranty.

How does the SSA-E differ from the SD-E? Both share the same pull weights and two-stage design. The SSA-E has the classic curved M4 bow, while the SD-E has a flat bow.

Is the SSA-E adjustable? No. Geissele lists it as non-adjustable, with a first stage of 2.0 to 2.5 lb and a second stage of 0.9 to 1.3 lb.

Buy the Geissele SSA-E Super Semi-Automatic Enhanced Two-Stage AR Trigger, Curved Bow

A trigger that gets out of the way at the break earns its place on a precision build. Browse more AR triggers in our catalog and order from our Lubbock, Texas gun shop for fast, insured shipping.