Renault R35 Tank Built and Ready with metal turret, LONG 37mm SA38 gun, optional hatch open or closed, Tank crewman and French Tank stowage. kit includes optional trench-crossing skid trail.
you can see pictures of the R35 with rail here too. Both look great.
The EWM R35 now comes in 3 versions. Short barreled SA!*, Long barreled SA£* and the command version with both gun type options.