Greater reliability, superior design, smoother, self cleaning 3.5 pound trigger that has less friction because of the hole prevents debris from entering the connector channel, should be installed by a Gunsmith or Armorer.
The Ultimate in Drop-in 3.5 lb trigger connectors for GLOCK. The Ultimate incorporates the patent pending debris channels which removes debris from the trigger mechanism and reduces the friction of the trigger parts making the Ultimate trigger smooth and self cleaning.
Why is self cleaning so important?
Because as you fire your pistol debris builds up on the trigger mechanism surfaces.
These debris cause additional friction.
This friction increases the weight of the trigger pull thus increasing the force applied to the connector.
As the trigger pull weight increases the connector is pushed towards the rear of the trigger housing eventually far enough that the pistol will not fire!
The channels also reduce the thickness of the connector body by 33%.
This reduction increases reset speed and because these channels are located on the centerline of the connector body they do not cause connector torsion.
These features along with a good polishing give you the Ultimate in light smooth 3.5 lb trigger pulls for GLOCK pistols.