My 32 and 686 both have trunions I blacked the action face on both put the barrels on with the forend opened and closed the guns viola both barrels have pressure on the trunion and breach face a clear outline in the smoke reside so they are on face, both guns have a metal piece machined on the barrels that contact the top of the actions the Beretta has locking pins the k32 a sliding hood .what I have learned is on these model guns the barrels rotate on trunions that hold the breech face to the action and metal machined on the barrels keep the barrels on the top of the action tight when the locking device is engaged.so they are on face in a traditional way but don't seem to have the gap required on a sxs.the end