... on the Archer Airguns blog. Scroll right down the page for the largest analysis of performance data that's ever been published on these interesting air rifles.
I hope this is useful!
The trigger usually has a loooong pull but can be quite light - as you'll see from the data in the blog. If you want to disassemble the two trigger assemblies (front and rear), there's lots of E clips to remove and replace. A sear engagement screw is included in the rear trigger group, there's no other factory-facilitated adjustment.
Archer Airguns Inc.
Online stores http://www.archerairguns.com