458 Socom

Shop .458 SOCOM Ammo – Big-Bore AR-15 Power Rounds In Stock

Browse .458 SOCOM (11.63×40mmRB) ammunition in stock at SGAmmo, your trusted source for bulk rifle ammo at competitive prices. Our selection offers reliable, hard-hitting performance for big-bore AR-style rifles. Whether you're preparing for range training, hunting, or tactical applications, this cartridge provides dependable results with every shot.

The .458 SOCOM was designed in the early 2000s by Marty ter Weeme of Teppo Jutsu LLC and Tony Rumore of Tromix in response to the limited stopping power of 5.56 NATO during special operations—famously during Operation Gothic Serpent in Mogadishu. It delivers heavy .458-caliber bullets (250–600 gr) from a standard AR-15 platform with minimal modifications—just a barrel and bolt swap—while still using standard magazines. Today, it is primarily used for hunting medium to large game at short ranges, as well as for suppressed shooting with subsonic loads. Its unique design allows deep penetration and energy transfer, making it ideal for close- to mid-range engagements.

All of our .458 SOCOM ammunition is in stock and ready to ship directly from our warehouse, so you can get the rounds you need without delay. Stock up now for range time, hunting, or tactical preparation, and take advantage of fast, reliable shipping on every order. Keep your rifle ready with SGAmmo’s dependable inventory and bulk ammo deals!