SightMark .450 Bushmaster In-Chamber Boresight w/ Red Laser Black. 450 Bushmaster Boresight is the perfect tool to get on paper fast without wasting time or ammunition. The premium boresight is made of durable brass and features an on/off end cap. It comes with batteries and a carrying case. If you need to sight-in your weapon quickly and accurately choose a .450 Bushmaster In-Chamber Red Laser Boresight Specifications for SightMark .450 Bushmaster In-Chamber Boresight w/ Red Laser: Manufacturer: SightMark Color: Black Features of SightMark .450 Bushmaster In-Chamber Boresight w/ Red Laser Precision Accuracy Reliable and durable Compact and lightweight Easy to pack and travel Comes with batteries and a carrying case Package Contents: SightMark .450 Bushmaster In-Chamber Boresight w/ Red Laser Battieris Carrying Case SightMark SM39049: .450 Bushmaster In-Chamber Boresight w/ Red Laser Black