I picked up a 12fv from Cabelas and it shoots decent. I have an extra bottom bolt release Accustock and dremeled out the area for the top bolt release to function properly. The 12fv has the internal mag and the Accustock is detachable mag. I have read the write up on the different bottom metals but not sure what I need since I am converting a bottom release stock to top bolt release. Can anyone steer me in the right direction on this? Thanks