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Heng Long Plastic Cannon Recoil BB Unit di ricambio per 3908 Challenger II 1/16 6.0 7.0 RC Tank Toucan Model TH20623-SMT8 - AliExpress
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Picatinny engineers modify M119A3 Howitzer to make it safer, simpler, more reliable | Article | The United States Army
![Cannon of the Amsterdam Admiralty. This ship's gun could fire massive iron balls weighing 18 pounds. The gun was primed by loading a ball with powder and a wad from the front, Cannon of the Amsterdam Admiralty. This ship's gun could fire massive iron balls weighing 18 pounds. The gun was primed by loading a ball with powder and a wad from the front,](https://c8.alamy.com/comp/2G01FWR/cannon-of-the-amsterdam-admiralty-this-ships-gun-could-fire-massive-iron-balls-weighing-18-pounds-the-gun-was-primed-by-loading-a-ball-with-powder-and-a-wad-from-the-front-down-the-muzzle-the-shot-would-be-fired-by-lighting-the-fuse-at-the-touch-hole-to-absorb-the-recoil-the-400-kilo-cannon-was-mounted-on-a-wheeled-carriage-it-took-eight-men-to-operate-the-gun-2G01FWR.jpg)