CMMG MkW-15 Lancer L5 458 SOCOM 10-Round Magazine

This is a 10-round polymer magazine for AR-15 pattern rifles chambered in 458 SOCOM, sold by CMMG under the MkW-15 Lancer L5 Advanced Warfighter line. It is built to feed 458 SOCOM cartridges reliably in the MkW-15 platform, which uses hardened steel feed lips modified to hold the 458 SOCOM case without machining or weakening the steel.

The magazine has an impact-resistant polymer body with aggressive texturing for grip, a slim profile, a non-tilt follower, constant curve internal geometry, and a stainless steel spring. The top of the magazine catch is steel, and the baseplate slides off for disassembly and cleaning.

The magazine is black and is listed for AR-15 MkW-15 458 SOCOM rifles. Its laser-engraved markings identify the cartridge. Note that the body will also accept 30 rounds of 5.56 ammunition, but it is modified to feed 10 rounds of 458 SOCOM.

• Caliber: 458 SOCOM
• Capacity: 10 rounds
• Platform: AR-15 (MkW-15)
• Body material: Polymer
• Feed lips: Hardened steel
• Spring: Stainless steel
• Color: Black
• Follower: Non-tilt