Royal Navy Soldiers Having Fun with Jet Packs Apparently these jets can go up to 300 km/h. Facebook Prev Article Next Article Military Checkout these cool gadgets... Related Posts World’s Largest Caliber Rifle Ever Produced – .905 Caliber 5 most exciting military technologies If You Detonated a Nuclear Bomb at The Bottom Of The Marianas Trench The US Military’s Most Powerful Gun Shooting Darts out of a Shotgun Weird Weapons – The Allies – Documentary