The aftermarket scope mounts that take place of the rear sight suck also, never hold zero, Ive tried three different brands, they all suck!.
Yes and no. S&K and Darrel's mounts are solid if you locktite everything down and won't move- very good mounts but they aren't cheap. Pretty much everything else is complete junk.
Not a fan of scout mounts either- they are the proverbial horse designed by a committee.