None of H&R's 308 barrels come with sights, you'd need to order an accessory barrel with sights for an extra $47 or more(dunno if they've raised the price), or have a smith drill and tap the barrel for a front sight, the Williams WGRS-H&R from H&R for $18 can be mounted in the two rear scope base holes if you want an aperture sight. Also see Peep and Firesights in the FAQs for more info on sights.
A complete 357mag rifle will be available, but it can only be fitted with shotgun/Huntsman barrels since it comes on an SB1 frame, it's also planned as a combo with 20ga barrel.
The Survivor barrel is a bull barrel, dunno if that fits your plan or not, it also doesn't have a recoil pad, just a hard synthetic butt.
Tim
http://www.hr1871.com/Firearms/Rifles/handiRifle.aspx