High Quality Content by WIKIPEDIA articles! The Y3 is a South African automatic grenade launcher manufactured by Vektor which is a subsidiary of Denel. It fires 40x53mm grenades at a rate of 280 320 rounds per minute. It can be vehicle mounted using a special bracket or used with a tripod. The weapon (with tripod) is man portable by a team of 3. The Y3 appeared first to the public in 2003 during a Defence Systems & Equipment international exhibition (DSEi) show in the UK.