Most likely the extra length will stick out below the holster no real problem but looks funny. They are the same gun but the one that comes in the range carry kit is a 4 inch barrel.
They do have to be modified to fit. The holster tucks in at the muzzle and stops the 5" from locking in. I took the belt sander and ground about 3/8" off the very bottom and it works just fine now(does stick thru about 1/2").