BSA Optics Laser Bore Sighter Kit with Arbors Heavy Duty Case BS30. With BSA Bore-Sighter Kit BS 30 you can save time and ammunition. BSA Bore Sighter Kit BS-30 has 15 studs for all popular calibers: .177 .22 6mm/.243.25 6.5mm .270 7mm .30 .32 .338 .35...