We make our own trigger components.
Each trigger group is assembled and tested, and fit to itself in lower receivers, then removed from those lowers and packed for shipment either in a lower parts kit or as a trigger kit. When it was set up here, the weight would have been approximately 3.8 pounds, knowing that it can lose up to a quarter pound over use, with 3.5 being the target.
Depending on what lower it went into, even basic tolerance stacking can create differences in fit and result in different parts interaction. Thousandths of an inch are all that are necessary to create a different fit from what the test lower produced with the exact same trigger kit.
We can bring the lower half in and adjust the trigger to it that's something you want to pursue. If so, please contact Cust Service at 866-980-7625 for a return authorization and shipment information.
Thanks.
Steve/RRA