Rifle For $820,000 By VO Vapen

Technical aspects
• Rifling
Some early rifled guns were created with special barrels that had a twisted polygonal shape, in particular the Whitworth rifle was the first to be made with the intention of spinning the round for the use of as a "rifle". Specially made bullets were designed to match the shape so the bullet would grip the rifle bore and take a spin that way. These were generally limited to large caliber weapons and the ammunition still did not fit tightly in the barrel. Many experimental designs used different shapes and degrees of spiraling; one widely produced example was the Metford rifling in the Pattern 1888 Lee-Metford service rifle. Although uncommon, polygonal rifling is still used in some weapons today with one example being the Glock line of pistols (which fire standard bullets). Unfortunately, many early attempts resulted in dangerous backfiring, which could lead to destruction of the weapon and serious injury to the person firing.