I own a rem 721,725 and 13 rem 700. The rem 721/722 has the same safety has a rem 700. Some of the older 700 can not be unloaded with the safty on, I have several. The 725 has a 3 way Enfield safety. The only difference between the old safeties on the 721/722 and older 700 safeties are if you can unload with safety off or on. Not sure when rem changed this. I never change the old safeties to new ones on my rifles, but that's me.