Hunting High and Low at 15 in the U.S., according to "Billboard" music charts and has sold about 1.8 million copies in the U.S. It peaked at 2 on the UK charts (re-enter at number 83 in 2015), and hit 1 in Norway. The album has been certified platinum in the United States and 3x platinum in UK. On the "Billboard" 200, "Hunting High and Low" held the record for the highest-charting album by a Norwegian artist until "Do It Again" by Norwegian duo Röyksopp and Swedish singer Robyn (which peaked at number 14). Beginning with the single "Take On Me", A-ha's debut album
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