Lancer Systems L5AWM AR-15 Detachable Rifle Magazine .300 Blackout 30 Round Translucent Smoke 1 Pack Polymer 30RD. 300 Blackout ammunition (200+ grain) the Lancer L5AWM 300BLK magazine features an updated internal geometry which allows longer heavier cartridges to stack properly increasing feeding reliability when compared to a traditional .223/5.56 magazine. The outside of the mag body is molded with distinctive .300 Blackout markings and the magazine ships with a contrasting flat dark earth floor plate for easy visual identification. Features: See Description Specifications for Lancer Systems L5AWM Smoke AR-15 .300 Blackout 30 Round Detachable Rifle Magazine: Manufacturer: Lancer Systems Color: Translucent Smoke Fabric/Material: Polymer Magazine Capacity: 30 Round Caliber: .300 AAC Blackout Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Condition: New Country of Origin: USA Features of Lancer Systems AR-15 .300BLK 30 Round Rifle Magazine Steel feed lips combine with a left-lubricating polymer follower and steel wire spring Package Contents: Lancer Systems L5AWM Smoke AR-15 .300 Blackout 30 Round Detachable Rifle Magazine What firearm models does the manufacturer say Lancer Systems L5AWM Smoke AR-15 .300 Blackout 30 Round Detachable Rifle Magazine is compatible with? The manufacturer says that Lancer Systems L5AWM Smoke AR-15 .300 Blackout 30 Round Detachable Rifle Magazine is compatible with AR-15Lancer Systems 428001-30RD: L5AWM AR-15 Detachable Rifle Magazine .300 Blackout 30 Round Translucent Smoke 1 Pack Polymer