Laserlyte barrel - Laserlyte Laser Trainer Barrel for Glock 19/23

the barrel fit and functioned perfectly in my Glock pistol and lit up the electronic target well. my only complaint is that it uses up batteries very fast at a rate of approximately one set of batteries lasting only three training sessions. this is partly due to the laser being sound activated causing the laser to fire when racking the slide and many other noises too.