I run several JPoint's on my personal weapons and am a dealer for them. The ARMY is currently using them in the sand box on some of their SPR's. The battery life is about 1 year and is Paralax free out past say 15yds (as are Aimpoint's and EOTech's). It does not give you muzzle side signature. With that being said, I would not use it as my primary optic. It is meant to be a back up. Here are some pics for you..