This classical rifle, back from the 21 Century, is compact and light, making for a deadly rifle The semi auto Mk 14 was beefed up using a rail gun system, making the old design more deadly, turning this once powerful gun into the Warhammer version of a semi auto gun The "Mk 15", what Jupiter calls it, is able to fire .25 caliber rounds through its magnetized barrel, making the massive FMJ rounds ever more deadly [b]Sem-Auto Fires .20 Caliber FMJ rounds[/b]