Start zeroing in your scope before even leaving your house with the 15-Arbor Deluxe Boresighter Kit from Bushnell. This boresighter saves you time and hassle at the range by aligning your scope's reticle with the bore to get your shots on paper quickly. The included arbors fit barrels from .177 all the way up to .50, with everything in between. A vinyl roll keeps everything organized for the next tim3e you need it.