At least one of the Zeiram 2 revolvers was built on a modified Enfield No. 2 Mk. I revolver.
On the left side of the gun one can see the screw and panel line configuration which is unique to the Enfield. Also visible on the replica is the edge of the recoil plate, which may or may not have been cut down.
Visible on the right side of the gun is the cylinder cam lever screw, just above the front of the trigger guard, the edge of the recoil plate, the bottom of the barrel catch spring, and the reused cylinder cam lever from the other side of the Enfield.