Yes, all current production rifle barrels come drilled and tapped, if you want a WGRS peep sight, be sure to have em add it to your order, they only charged $18 for it last year, you won't beat their price, also make sure they put on a front sight of the proper height for it, it's better they know up front whatcha want than try to work with it after the fact.
Turn around can be as little as 3 weeks or as long as 9 weeks, maybe longer if they don't have the barrel in stock when they get to your order.
Tim