On my J P Clabrough & Bros SLNE the forend cannot be replaced with the hammers down. It has what I would consider conventional cocking levers. On these the lever is hinged in the bar of the frame. The longer rear portion lifts the toes of the manner, while the shorter front portion extends through the knuckle to engage the forend iron. With down the levers are do not ave eniugh clearance to allow the forend to be reassembled without 'un-due" force.
Miller/TN

Miller/TN
I Didn't Say Everything I Said, Yogi Berra