Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger
The Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger is a finely-tuned semi-automatic-only version of our full-auto, two stage combat trigger presently used in the U.S. Special Operations Community. Built on the chassis of the Geissele SSA, the Geissele SSA-E provides enhanced trigger control and weapon accuracy while maintaining the robustness and reliability of our combat-proven two-stage trigger. The Geissele SSA-E reduced 1st and 2nd stage pull weights result in a trigger with a smooth, light 1st stage take-up and a crisp, candy cane-like 2nd stage break. The Geissele SSA-E is ideal for use in precision Squad Designated Marksman type rifles where weapon accuracy and reliability are critical and a non-adjustable drop in trigger is desired.
Geissele SSA-E Trigger Performance Advantages for the Shooter
The Geissele SSA-E has a pull weight of about 3.5 lbs. There
is 2.3 lbs. on the 1st stage and 1.2 lbs. on the 2nd stage. The pull
weights and sear engagement are non adjustable by the shooter.
Trigger and hammer are made from quality tool steel.
Sear surfaces are cut by a wire edm machine. Sears cut this
way are very accurate and the non-directional surface finish of the wire
edm gives a smooth trigger pull without the associated grittiness of
directional machining marks left by a milling cutter.
The initial force needed to start the disengagement of the sear
surfaces is low and the force linearly increases at a low rate. This
helps the shot to fall at the initial point of aim and aids in building
shooter confidence in his weapons ability to put the rounds where his
sight is pointing.
The Geissele SSA-E trigger allows the shooter to slap through
the trigger pull on close in shots but also set up a long range shot with
a crisp trigger break.
A full force hammer spring is used for quick locktime and positive
ignition of all types of ammo. No lightened hammer spring is used.
The hammer is lighter than a standard AR15 hammer. The
lightened hammer favorably decreases locktime over a standard
hammer from 8.5 to 5.1 ms and increases accuracy of the weapon.
Geissele SSA-E Advantages for the Armorer
The Geissele SSA-E is a simple design that is very similar to
the original M16 trigger. The number of parts is identical.
There are no adjustment screws to come loose.
All springs are captive; they will not get lost during disassembly
in the field.
The entire trigger can be dissembled for cleaning (no rivets or
The Geissele SSA-E trigger can be installed without removing the safety.
Geissele SSA-E Sear engagement is pre-set from the factory.
Geissele SSA-E Hammer and trigger pins are a close slip fit into nominal
receiver holes so the trigger can be installed and removed with
Geissele SSA-E Triggers come with a slave pin for the trigger/disconnector
assembly for easy installation.
Geissele SSA-E Safety Advantages
The Geissele SSA-E is a 2 stage trigger where there is
generous overlap of the sear surfaces which contributes to safety and
a low tendency of any inadvertent movement of the trigger to discharge
The Geissele SSA-E has a patented pseudo sear that is
almost identical to the standard AR15 single stage sear. However, this
secondary sear has surfaces that never touch during normal operation.
This sear prevents the hammer from falling unless the trigger is pulled.
The Geissele SSA-E secondary safety sear contributes to shooter confidence in
dynamic/vehicle situations where a fellow shooters muzzle may cover
him. There is firm knowledge that even with the safety in the fire
position the weapon can never discharge unless the trigger is pulled.
Geissele SSA-E Trigger timing is robust and parts have been sized to operate
with a certain amount of wear to the working surfaces. The trigger is
designed to operate in dusty, abrasive environments that cause wear.
Geissele SSA-E Trigger
1st Stage 2.3 lbs.
2nd Stage 1.2 lbs.