Geissele Automatics SSA Super Semi-Automatic Rifle Trigger

$220.00 $215.00
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(7 reviews)
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Geissele Automatics SSA Super Semi-Automatic Rifle Trigger


The Geissele Super Semi-Automatic (SSA) Trigger is the semi-auto only version of a select fire trigger that Geissele makes for customers in the U.S. Special Operations community. The SSA is a non-adjustable combat trigger, it is not a match trigger. The second stage break is like a carrot rather than an icicle. Suitable for Close Quarters Battle (CQB) and mid-range carbine work, the Geissele SSA is also the perfect trigger for Squad Designated Marksman (SDM) rifles. A short summary of the Geissele SSA features and advantages follows.

Performance Advantages for the Shooter

  • The Geissele SSA has a pull weight of about 4.5lb: 2.5 lbs on the first stage and 2lb on the second 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 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 and increases accuracy of the weapon, especially for snap shots.

Advantages for the Armorer

  • The Geissele SSA 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 staked parts)
  • The trigger can be installed without removing the safety
  • Sear engagement is pre-set from the factory.
  • Hammer and trigger pins are a close slip fit into nominal receiver holes so the trigger can be installed and removed with rudimentary tools.
  • Triggers come with a slave pin for the trigger/disconnector assembly for easy installation.

Safety Advantages

  • The Geissele SSA 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 weapon.
  • The Geissele SSA 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 secondary safety sear contributes to shooter confidence in dynamic/vehicle situations where a fellow shooter's 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.
  • 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.



  • 5
    Geissele Automatics SSA Super Semi-Automatic Rifle

    Posted by Lowell Carter on 4th Apr 2021

    Great feeling trigger. Super easy to install. Very high quality construction.

  • 5
    Easy Install / Smooth trigger

    Posted by Dev N on 7th Aug 2017

    Definitely an upgrade from the standard MilSpec trigger included with my AR. Highly recommended.

  • 5
    Geissele SSA

    Posted by Shawn on 1st Jul 2017

    I purchased two Geissele SSA triggers from Arms Unlimited, along with a Colt LE6933 SBR upper and the items were promptly shipped out and arrived packaged securely. I recommend Arms Unlimited highly for their selection, price and service.

  • 5
    I LOVE this trigger

    Posted by Richard on 20th Feb 2016

    Arms Unlimited has the best price I have ever found on Geissele triggers. They shipped quickly and it arrived in perfect condition. Installation was straightforward and the difference in my Sig MPX is nothing short of astounding! Do not hesitate - buy this trigger today. You will not regret it.

  • 5
    Geissele Triggers Worth Every Penny !!

    Posted by Don C. on 19th Feb 2016

    Trigger set and Arms Unlimited both performed FLAWLESSLY, thanks guys for shipping a quality product in a highly professional manner, we will do business again !!

  • 5
    Great trigger

    Posted by JOHN SCHOEN on 23rd Dec 2015

    Fast shipping. Good price. EASY INSTALLATION.

  • 5
    Geissele SSA

    Posted by WCNM on 13th Nov 2015

    Great trigger. Tried 2 other drop in triggers before finally just going with what is already known as the best. Should have saved me the time and trouble and gone with the Geissele first. Arms Unlimited has amazing service and very fast shipping. Ordered and shipped the same day...that's service!