LaserMax Glock Sights 262733 Gen 4 only<br />http://www.amazon.com/gp/product/B0052PU4FO?tag=sukses2015-20<br />Battery Life Approx 1-3 hours continuous use <br />Lens GlassLaser <br />Design Internal guide-rod <br />Alignment Self-aligning <br />Activation Ambidextrous fingertip
