Lancer Systems L5AWM AR-15 Basepad 6 Round Magazine Extension Red. 56x45mm NATO .223 Remington Weight: 0.2 lb Features of Lancer Systems L5AWM Basepad 6 Round Magazine Extension Increases L5AWM capacity by (6) six rounds Optimized for use with original magazine spring Speeds up reloads by increasing magazine drop efficiency Installs in seconds; no additional tools or permanent modifications required CNC machined from 6061 aluminum; anodized and laser engraved Compatible with all standard capacity L5 Advanced Warfighter Magazines Package Contents: Lancer Systems L5AWM AR-15 Basepad 6 Round Magazine Extension What firearm models does the manufacturer say Lancer Systems L5AWM AR-15 Basepad 6 Round Magazine Extension is compatible with? The manufacturer suggests that Lancer Systems L5AWM AR-15 Basepad 6 Round Magazine Extension is compatible with AR-15Lancer Systems L5AWMEXTBP06RED: L5AWM AR-15 Basepad 6 Round Magazine Extension Red