Most likely the old BVSS already has a 3 screw trigger rather than the old lawyer trigger. The 3 screw has a sear adjustment set screw. If this is the trigger you have it can easily be tuned up very nicely. With a little tuning and replacing the trigger return spring with a small piece of piano wire ( I use .043) These can be tuned at about 2# to rival most any aftermarket trigger and anything but clunky once tuned. Just be sure to lock any adjustments in place with some nail polish when you're done to prevent and further adjustment from recoil. Pretty sure instructions for adjusting a 3 screw trigger can be found around here someplace with a search.
:)
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