SightMark In-Chamber Red Laser Boresight 6.5 Grendel Red Brass. This Boresight from the experts at SightMark is made with a durable brass construction is easy to pack and travel with and is guaranteed to provide you with years of accuracy. The SightMark In-Chamber Red Laser Boresight has a visible laser up to 100 yards day or night is perfect for hog and varmint hunters and is incredibly reliable. For a great way to make sure you are using the best possible equipment for the best possible results choose the Sight Mark In-Chamber Laser Boresight. Specifications for SightMark In-Chamber Laser Boresight: Manufacturer: SightMark Caliber: 6.5mm Grendel Included Accessories: Battery Pack Limited Lifetime Warranty Carrying Case Fabric/Material: Brass Battery Type: AG3 Finish: Brass Color: Brass Gun Model: Universal Beam Color: Red Additional Features: Precision accuracyReliable and durableFastest gun zeroing and sighting systemreduce wasted cartridges and shellsCompact and lightweightEasy to pack and travel Condition: New Battery Quantity: 2 Features of SightMark In-Chamber Laser Boresight Precision accuracy Reliable and durable Compact and lightweight Easy to pack and travel Durable brass construction Comes with a carry case Package Contents: SightMark In-Chamber Laser Boresight SightMark SM39047: In-Chamber Red Laser Boresight 6.5 Grendel Red Brass