So I found this...

The Dagger™ trigger may fail the (dry fire) Trigger Reset Function Check on page 21 of the Dagger™ manual with both a complete Dagger™ pistol and a complete Dagger™ frame paired with an OEM Glock G19 gen3 or aftermarket upper / slide. Refer to the Trigger Reset Function Check Failure (TRFCF).

To fix the TRFCF, PSA redesigned the Dagger™ trigger by bending the sear of the cruciform up slightly, improving the engagement with the firing pin lug.

On October 12, PSA founder Jamin McCallum stated the fix for the TFRCF (assumed to be limited to the redesigned trigger) had been incorporated into production, however, Jamin didn’t give a specific date or Dagger™ serial number after which the fix would’ve been incorporated. Therefore, we assume the fix for the TRFCF was incorporated into production no later than October 12.



It’s important that you:

1. Check the sear engagement of your Dagger™ trigger using an armorer’s plate. This is especially important if you’re pairing a complete Dagger™ frame with an OEM Glock G19 gen3 or aftermarket upper / slide.​
​
2. Repeatedly perform the (dry fire) Trigger Reset Function Check.​

If your Dagger™ trigger visually exhibits poor sear engagement using an armorer’s plate or fails the (dry fire) Trigger Reset Function Check, contact PSA Customer Service,

Hours: Monday through Friday, 9am - 5pm EST​
Phone: (803) 724-6950​

or,

Message PSA Customer Service​

PSA will E-mail you a pre-paid shipping label to return your Dagger™ pistol or frame in order to install the redesigned trigger, improving the safety and reliability of your complete Dagger™ pistol or your custom build based on a complete Dagger™ frame.

Be safe!