Boresight your firearm quickly and easily using the FireField .223 & 5.56x45 In-Chamber Red Laser Boresight. This brass boresight loads directly into the chamber of your firearm and produces a 2-MOA red laser dot at the theoretical point of impact. It can be powered by two AG5 or three AG3 batteries for one hour of continuous operation and has an On/Off switch on the end cap. 

• For .223 & 5.56x45 Caliber
• 2-MOA Red Laser Dot
• Loads Directly into Chamber
• Projects Theoretical Impact Point
• 2x AG5 or 3x AG3 Batteries/1-Hour Life
• Brass Housing with On/Off End Cap