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Call of Duty Wiki
The subject of this article appears in Call of Duty: Modern Warfare (2019)
"Conversion kit to use high caliber .458 SOCOM ammunition for greatly increased stopping power. This devastating conversion comes with a cyclic rate reducer to help control recoil."
— Description

.458 SOCOM 10-Round Mags is an attachment for the M4A1 in Call of Duty: Modern Warfare. It is a conversion kit which chambers the gun in .458 SOCOM rounds which have increased damage and range. However, the fire rate of the gun is reduced alongside the ammo capacity and a reduction in recoil control.