This is mickey and roses gun from doomsday and journeys end one has a sharp muzzle with nothing underneath and the other is just small with another section beneath the top muzzle.
There are many differences between the two guns bat are still similar here is some differences .
it has cooling cells
and a cell underneath the muzzle it is rustier
it has a less powerful and thicker energy blast
slower pump action
faster pump action
sharper muzzle and no cell underneath
thinner and way more powerful energy blast
bit bigger better energy and gas chamber green lights around muzzle.
they are the differences between the 2 guns