Not sure of the brand but that is one of the first generation of Laser sights. Rather than using a solid state laser diode (shockproof) it used a glass tube as a lasing medium containing a mixture of Helium and Nitrogen (Gas laser - Read Fragile). The beams were very dim compared to todays standards, they ate batteries quickly, and gas tube life was very poor.
It's amazing how far things have come in 20 or so years.
For much the same reason he needed sunglasses.



























