Sightmark's 6.5mm Grendel In-Chamber Red Laser Boresight is a must-have for 6.5 Grendel enthusiasts and shooters. Chambered like a regular round this laser boresight is used to sight-in riflescopes and get shooters on paper without wasting time or ammo. With a visible laser up to 100 yards day or night the 6.5 Grendel laser boresight is ideal for hog and varmint hunters. Made of durable brass the 6.5 Grendel utilizes an on/off end cap has up to 1 hour of battery life and operates at temperatures from 15 to 120 degrees Fahrenheit. Sightmark's 6.5 Grendel guarantees precision is easy to pack and travel and comes standard with a carrying case.Features: Precision accuracy Reliable and durable Compact and lightweight Easy to pack and travel Durable brass construction Comes with a carrying case