Things I liked:Decent price, easy install. Things I would have changed:Instead of just two batteries would have three. What others should know:To make the sight stay lit you need to buy any kind of a battery and insert it between the two batteries that came with the sight. Laser jumps out of alignment after extended use of gun.
Things I liked:A must have for any break barrel rifle. Things I would have changed:Have a device to attach the pen to a neck badge holder. What others should know:Buy a badge holder that you can attach a retractable type badge holder to that springs back into place and can attach to the pen. These run about $1.00 at Walmart and work great. The pen is always there to simply extend and load a pellet then retracts.