I love my Mk18 ABR, and I never leave any stone unturned when searching for ammo to feed it. The relative scarcity of 7.62 NATO ammunition meant that when I raided an enemy encampment and found 10 Mags stashed in an ammo box, it was cause for celebration. This duplication exploit totally kills the joy of raiding an enemy checkpoint in the hope of just ONE MORE BULLET--a vital part of the immersion when fighting in an under-supplied guerrilla army.