**Effective immediately, our Flat Bottom Benchrest Alignment Blocks come with accessory rails and bolts that allow you to convert them to 4" blocks. In the 4" configuration, they have the same footprint as Alex Wheelers LRB stock, or a 3" stock converted to 4" via F&C's bolt-on conversion rails.**
Our Benchrest Alignment Block is a multipurpose tool that will help you get set up more precisely in less time. First, it's great for leaving in your front bag to maintain its shape. Second, the integral spirit level gets you level where it matters. You'll find there's often a discrepancy between the base of your rest and the top surface of your front bag (see picture). That's why your cross hairs aren't level even when the base of your expensive rest is! Third, it's great for getting the rear bag in line with the center of the front bag and the target. You can either eyeball it using one of the two supplied reticles, or use the supplied string. Fourth, by tying knots in the appropriate spots or marking the string, you can precisely set-up the front to rear bag spacing for multiple rifles. Finally, with its .033" per foot sensitivity, its a handy, precise, general purpose level.