I did look at the instruction sheet that is posted online. Looks like two screws that I need to loosen with the American made Mark V. The German made Mark V includes a pin that needs to be removed. Looks straight forward for the most part.
Before anyone asks I am replacing the factory trigger due to excessive creep. I sent the rifle back for a misaligned mag box issue that wouldn't allow the cartridges to drop out the bottom and while there I asked them to fix the junk trigger but they didn't do it. I had three issues with the rifle - Misaligned mag box, sling swivel stud that was extremely loose and junk trigger. Made notes about the issues which I sent back with the rifle and also informed CS prior to shipping. They sent back a a newly aligned mag box that appears to be fixed, crooked sling stud, and of course the junk trigger. Not a happy customer. I have to say the quality of my Accumark wasn't even close to what I paid for it.
Ron