Once the lugs are cut, you must choose the proper barrel link. Measure
the distance (Distance 1) from the bottom of the barrel link hole to the lug
surface where it will contact the slide stop pin when the barrel is locked
into battery. Next, measure the distance between the two holes in a barrel
link (Distance 2). Find a link where Distance 2 is equal to, or slightly longer
than, Distance 1.
Paint the sides of the barrel lugs with a permanent marker and lay a link
on the outside of the lugs using a link pin to hold the link in place. Position
a sharp scribe in the slide stop hole of the link and rotate the link thru it’s
arc scribing a line on both sides of the barrel lugs. This will show you how
much to remove off of the front of the barrel lugs to allow the link to swing
freely throughout it’s movement as the barrel cycles in and out of battery.
The flats on the lugs should be as long as possible to lock on the slide stop
pin for best accuracy. Install the link and pin into the barrel and hand cycle
to check functioning