You need the m24 and the contenter. So you only have to get some ammo and after that just drop the contenter and pick it up again.You get +4 bullets and you can just repeat it (i got in one game 42 bullets on the m24)
Thank you for reporting this bug. I have already posted it in the OneDrive some days ago and its waiting for DEADMONSTOR to fix it. I would prefer if you avoided forums and instead reported exploitable bugs to LT members instead as the further its spread the more its exploited