recoil install here is what you will be working with

nowyou will flaten out the persihing recoil mount so it is flate as in the pic

now youput the mount on the right side mantlet mount and drill 2 small holes to install the recoil mount
one you have the screws in use 5 min epoxy and fill in the back side of the plastic mount leaving onl the pin hole where it is attaches to the turret mount

then bore out the mantlet so the barrel slides freely in and out

assemble per istructions and your done