The CG Mod 22 2-stage Universal Trigger is a true completely adjustable 2-stage trigger. 

Since it uses a 3.5mm Anschutz type trigger rail, any Anschutz 54 trigger shoe will fit. Adjustable pull weights from 10oz to over 63 oz! It can also be adjusted to be used as a single stage trigger. 

No modifications required to install for liability reasons have a gunsmith install/adjust it.