All KIDD complete trigger units come with the auto bolt release as standard, but this product can be used to upgrade your current factory trigger.

Replacement instructions:

With the trigger removed from the receiver push the ejector pin and magazine release latch pin 1/3 of the way out starting from the bolt hold open side of the trigger.  Pull out the current bolt hold open then slide in the KIDD Auto Bolt release.  Push the two pins back through.  Check if it functions correctly by depressing the portion close to the magazine release lever to see if the top side of the auto bolt release toggles up.

Package includes:

Auto Bolt Release