Alan Tarney in the mid-1980s when he teamed up with Norwegian pop band A-ha. Producing the second version (after Tony Mansfield) of their first single "Take on Me" (1984), the song went on to become a worldwide hit. He worked on the band's biggest selling first three albums, being a co-Producer of "Hunting High and Low" (1985), and Producer of "Scoundrel Days" (1986) and "Stay on These Roads" (1988). He renewed his working relationship with the band in the production of their album release "Cast in Steel" (2015). He produced David Cassidy's comeback 1985 album "Romance," which included the top ten hit
High–low system High-Low Principle, but with a twist on the original design. The GP-25 40-mm grenade launcher fits under the assault rifle and fires a caseless projectile that is muzzle-loaded. Instead of having a case, the high-pressure chamber is located on the rear of the projectile with ten vent holes, in which the launcher barrel acts as the low-pressure chamber. The ignition of the propellant gases also causes the drive band to engage the launcher grooves, similar to the American Civil War Parrott muzzle loading rifled cannon. While little documentation exists, in the 1950s the Soviet Army developed 73-mm cannon for wheeled