This is the Lancer AR-10 .308 / 7.62×51 25-round magazine. Also known as the L7AWM, which is short for L7 Advanced Warfighter Magazine.

Lancer designed this to be the ultimate AR-10/SR-25/M110 magazine for military, law enforcement, and competition.

Being the first true steel/polymer hybrid magazine, the Lancer L7AWM features a hardened steel lip assembly and anti-tilt follower, with an advanced polymer construction. This .308 Winchester / 7.62x51mm NATO / 6.5 Creedmore magazine offers the reliability and endurance of traditional steel magazines while offering the weight and maneuverability of advanced, light polymer.

Moving on, its advanced polymer body offers micro-stipple pyramids for excellent grip and control. And at the bottom, it provides an L7AWM baseplate for quick access to the internals for cleaning if desired. 

Get the best AR-10 magazine that money can buy – pick up an L7AWM 25-round magazine today.